Published on
Nov 2024

contents

◗◗Event app for conferences: 20 questions to identify the best

16 min. read
event app for conferences

An event app for conferences is the secret weapon for anyone seeking to turn fleeting opportunities into lasting outcomes. It is not just another gadget; it is the cornerstone of modern-day events, quietly revolutionizing how exhibitors engage with attendees and how attendees navigate the endless possibilities that conferences promise.

Think of the last time you attended a conference. The rooms buzzed with energy, brimming with conversations and connections waiting to happen. But how many of those moments slipped away, lost in the shuffle of crowded halls and overlapping schedules? The reality is, without the right tools, even the most well-organized conference can feel overwhelming.

Here is the good news: technology has leveled the playing field. Over 80% of event organizers now use mobile tools to streamline everything from logistics to attendee engagement. A well-designed event app does not just simplify; it amplifies. It transforms confusion into clarity, possibilities into actionable steps.

This article will explore why conferences are uniquely positioned for transformative connections, how an event app can elevate your experience, and what you need to know to choose the perfect app. Whether you are an exhibitor or an attendee, this guide will ensure that your next conference is not just an event, but a turning point.

How are conferences different from trade shows and conventions?

Conferences, trade shows, and conventions each serve a unique purpose, yet their distinctions often blur. Understanding these differences is vital for exhibitors and attendees to tailor their strategies and maximize their outcomes.

A conference is where ideas converge. These gatherings are designed for learning, networking, and collaboration. Think of them as curated experiences where thought leaders share insights, attendees participate in workshops, and exhibitors position themselves as experts in their fields. Conferences prioritize knowledge-sharing over commerce, making them fertile ground for relationship-building and long-term influence.

Trade shows, in contrast, are high-energy marketplaces. Vendors and exhibitors dominate the floor, showcasing products, services, and innovations. The objective is clear: visibility, lead generation, and direct sales opportunities. Attendees are often decision-makers or influencers, scouting for solutions and partnerships. It is an environment driven by transactions, where every interaction has the potential to turn into business.

Conventions blend elements of both, often emphasizing a specific industry or community. They bring together large audiences, merging the professional focus of conferences with the commercial energy of trade shows. Exhibitors and attendees alike benefit from the expansive scope, offering broad visibility and opportunities to network across diverse roles.

While the formats vary, the underlying thread is connection. Each setting demands a different strategy but shares a common goal: making meaningful interactions count. This is where an event app becomes indispensable, adapting to the specific needs of each format while enhancing every participant’s experience.

What is an event app?

An event app is not just a piece of technology—it is a system designed to simplify and amplify the way people interact at conferences.

For exhibitors, it is a tool that keeps you organized. No more scattered business cards or missed connections. An event app helps you capture leads in real time, track your conversations, and follow up effectively.

For attendees, it is a map and a compass. It guides you to sessions, introduces you to people you should meet, and keeps your schedule in check.

Here is the real value: event apps create order from chaos. They remove friction so you can focus on what matters—building connections, exchanging ideas, and achieving your goals.

You do not just attend the event; you experience it with purpose.

Advantages of using an event app at a conference

Conferences are opportunities to connect, learn, and grow. Yet, without the right tools, even the best intentions can fall short. This is where an event app creates a shift—not just in how you manage your time but in how you leverage the event for maximum impact. Let us break it down.

1. Creating meaningful interactions

Think of the last conference you attended. How many conversations were accidental versus intentional? An event app removes the guesswork. Features like attendee profiles and smart matchmaking turn every introduction into a purposeful interaction.

Here is the benefit: instead of meeting someone and thinking, “What do they do?” you already know how your goals align. You save time, and every conversation has the potential to move the needle.

2. Turning information into action

Conferences are information-rich environments, but they can also overwhelm. Notes, sessions, and speaker details often scatter by the event’s end. Event apps solve this by acting as your personal organizer.

For example:

  • Real-time session updates keep your day structured.
  • Interactive note-taking features help you capture insights as they happen.
  • Session feedback tools ensure you can reflect and implement what you learned.

When the conference is over, you leave with clarity, not clutter.

3. Streamlining lead generation

For exhibitors, the most significant challenge is often this: How do you make sure every valuable interaction is captured? Event apps simplify this process. With features like in-app lead capture, business card scanning, and automated follow-ups, every connection is logged and ready to act on.

The impact is twofold:

  1. Leads do not slip through the cracks.
  2. Follow-ups happen quickly, keeping the momentum alive.

This turns a conference from a single-day event into a launchpad for long-term relationships.

4. Enhancing the attendee experience

Attendees are not just participants—they are active stakeholders in the conference’s success. An event app ensures their journey is smooth and engaging.

For instance:

  • Push notifications eliminate missed opportunities by keeping attendees informed.
  • Gamification elements, like leaderboards or challenges, make participation fun and rewarding.
  • Live Q&A sessions foster direct engagement with speakers, making sessions more interactive.

By removing friction, you elevate the experience for everyone involved.

The advantage of an event app is simple: it makes the complex feel manageable. Whether you are an exhibitor capturing leads or an attendee seeking insights, the app ensures that every moment is optimized.

How to choose the right mobile app for conferences

Selecting the right event app can feel overwhelming. There are countless options, each claiming to be the solution you need. But the truth is, the “right” app is not about features alone. It is about fit. Fit for your goals, your audience, and your event’s specific needs.

Here is a framework to help you make a decision you will not regret.

Step #1: define your goals

The app you choose should align with your primary objectives. Start by asking yourself:

  • Are you focused on attendee engagement?
  • Is lead generation your top priority?
  • Do you need robust analytics to measure success?

For instance, if networking is a core focus, look for apps with attendee matchmaking and messaging features. If lead capture matters most, prioritize apps that integrate with your CRM and provide detailed reporting.

Clarity on your goals ensures you evaluate apps through the lens of what you actually need, not just what they offer.

Step #2: evaluate usability

An app can have the best features in the world, but if it is difficult to use, no one will adopt it. Focus on these questions during your evaluation:

  • Is the interface intuitive for all users—organizers, exhibitors, and attendees?
  • How easy is it to set up and customize?
  • Does it offer multilingual support for diverse audiences?

Remember, simplicity does not mean lack of sophistication. A good app should balance ease of use with powerful functionality.

Step #3: assess scalability

Your event app should not just work for this year’s conference; it should grow with your vision. Consider these factors:

  • Can the app handle varying event sizes?
  • Does it support hybrid or multi-location events?
  • Are there options for integration with other tools like marketing automation platforms or attendee tracking systems?

Scalability ensures you do not outgrow the app as your events expand in scope or complexity.

Step #4: test support and reliability

Even the best apps encounter issues. The question is, how quickly can those issues be resolved? Evaluate the provider’s support system by looking at:

  • Availability of live chat, email, or phone support.
  • Response times during emergencies.
  • Access to onboarding resources, user guides, and training materials.

Additionally, ensure the app has a solid track record of uptime and reliability. A technical failure during your event is not an option.

Step #5: compare costs with value

Cost matters, but value matters more. Do not focus solely on price tags; instead, weigh the app’s features and benefits against your event’s needs. Ask:

  • Are there hidden fees for additional features?
  • Does the app provide ROI through time saved, leads captured, or enhanced attendee satisfaction?

The right app is an investment, not just an expense.

Choosing the perfect mobile app for conferences requires thoughtful evaluation, but the reward is worth it. A well-chosen app will not only meet your current needs but elevate your entire event strategy for years to come.

20 must-ask questions when selecting an event app for conferences

The process of choosing an event app for conferences is much more than a checklist exercise. These questions—and their answers—will give you the clarity you need to select a platform that aligns with your event’s goals. Where relevant, tools like momencio provide a practical solution, but remember, the right app is always about what fits your unique needs.

Questions about features and functionality

  1. Can it support lead capture through QR codes, business card scanning, or badge integration?

Absolutely. Lead capture is essential for exhibitors. An ideal app should integrate with badge scanning or QR code technology for quick and seamless lead collection. momencio excels in this area, offering intelligent lead capture solution that sync with CRMs, ensuring no data is lost and every lead is actionable.

  1. Does the app offer attendee matchmaking and real-time messaging for better networking?

Yes. Networking is often the heart of a conference. Look for apps with matchmaking algorithms that connect attendees based on interests or professional goals. Real-time messaging capabilities allow for spontaneous, meaningful interactions. For instance, momencio enhances networking by capturing and tracking lead engagement, helping exhibitors identify prospects worth pursuing even after the event.

  1. Does it include personalized schedules, reminders, and notifications for attendees?

Yes. A good event app ensures attendees are never overwhelmed. Features like customizable agendas, push notifications, and reminders help them stay organized and maximize their experience. While momencio focuses on exhibitors’ needs, its integrations can complement apps offering these attendee-focused features, creating a holistic event experience.

  1. Are there engagement tools like live polls, Q&A, or gamification features?

Definitely. Event apps for conferences with features like live polls and Q&A make sessions interactive, while gamification boosts participation. For exhibitors using momencio, integrating such tools can enhance booth engagement, providing real-time insights into attendee interests.

  1. Can exhibitors showcase their products and services digitally within the app?

Yes. Digital showcases are critical in hybrid and in-person events. Many apps allow exhibitors to upload videos, brochures, and product details, creating a rich experience for attendees. With momencio, exhibitors can take this further by linking digital showcases directly to captured leads, enabling tailored follow-ups.

Questions about customization

  1. Is the app customizable to reflect your branding and event theme?

Yes. Branding consistency is non-negotiable. Choose an app that allows customization of colors, logos, and themes to match your event’s identity. While momencio focuses on engagement and lead capture, its seamless integration ensures any branding efforts within the app stay aligned.

  1. Can you configure user experiences for different audiences (attendees, exhibitors, sponsors)?

Yes. Tailoring user journeys is essential. Attendees might need schedules and networking features, while exhibitors require lead capture and analytics. Apps like momencio cater to exhibitors specifically, offering unique tools like engagement tracking, which can complement attendee-centric apps for a well-rounded event experience.

  1. Does the app allow content personalization for individual users?

Yes. It is importance to check if the event app for conferences offers personalized presentations and interactive content. Your prospects should not just listen, they should engage. With momencio, turn every presentation into a showstopper—immersive videos, dynamic presentations, and interactive content that pull your prospects in and keep them engaged.

Questions about integrations

  1. Does the event app for conferences integrate with your existing CRM or marketing tools?

Yes. Seamless integration saves time and ensures data flows effortlessly. momencio’s strength lies in its robust CRM integration, syncing lead data directly into your pipeline and enabling rapid follow-ups.

  1. Can the app integrate with tools for ticketing, registration, or payment processing?

Yes. Integration with ticketing platforms like Eventbrite or Cvent simplifies attendee onboarding. momencio complements these apps by ensuring every attendee touchpoint is optimized for engagement.

Questions about usability

  1. Is the event app for conferences easy to navigate for both tech-savvy users and beginners?

Simplicity in design is vital. The mobile app should offer intuitive navigation and minimal learning curves. Exhibitors using momencio benefit from its user-friendly interface, which streamlines complex tasks like lead scoring and post-event analytics.

  1. Is the mobile app optimized for use on multiple devices?

Yes. Attendees and exhibitors use a mix of smartphones, tablets, and laptops. Cross-platform compatibility ensures a consistent experience. momencio aligns perfectly with this need, offering accessible real-time insights across devices to keep your teams in loop.

Questions about analytics and insights

  1. Does the app provide real-time engagement data?

Yes. Real-time insights into session attendance, booth traffic, and lead interactions are invaluable. momencio shines here, offering exhibitors detailed engagement analytics that empower smarter follow-ups.

  1. Can you track ROI metrics specific to exhibitors or sponsors?

Yes. Sponsors and exhibitors need clear data to justify investments. With momencio, event ROI tracking becomes seamless, as every interaction is recorded and linked to outcomes, offering a crystal-clear view of value delivered.

Questions about support and reliability

  1. Does the app offer 24/7 technical support during the event?

Round-the-clock support is crucial to resolving issues quickly. Many providers offer live chat or phone support, ensuring smooth operations. momencio supports its users with dedicated resources to address real-time queries, ensuring nothing disrupts their flow.

  1. Are there onboarding resources like training guides, documentation or tutorials?

Onboarding ensures everyone gets the most out of the app. Momencio’s customer success team ensure smooth onboarding and offers easy-to-follow guides that simplify setup and usage for exhibitors.

Questions about scalability

  1. Can we try the event app for conferences for a single event, and can the app scale to accommodate large or multi-location events?

The importance of test run before committing long term to the app cannot be overstated. Which is why momencio offers single event plan to provides businesses with everything they need for high sales efficiency. As events grow in size or complexity, scalability becomes essential. This is why businesses can continue using momencio beyond the single event by subscribing to any of our plans based on their requirements.

  1. Does the app support hybrid or virtual components for greater flexibility?

Yes. Hybrid events are here to stay. Look for apps that integrate features for virtual attendees. Momencio integrates effortlessly into hybrid environments, enhancing lead management across digital and physical channels.

Questions about cost and value

  1. Does the app’s pricing structure fit your budget without hidden costs?

Yes. Transparent pricing is critical. Apps with modular pricing often allow you to select only what you need. Momencio provides clear value by focusing on features that directly impact exhibitor outcomes, ensuring your investment drives results.

  1. Does the app demonstrate measurable value in enhancing attendee or exhibitor outcomes?

Yes. Ultimately, value is about impact. An app should improve the experience for attendees and generate measurable results for exhibitors. Momencio delivers this by capturing actionable data, enabling exhibitors to turn interactions into meaningful relationships.

Lead Scoring Criteria - momencio business card scanner app for event lead capture banner

Final checklist for app selection (top criteria for selecting the perfect app)

When choosing an event app for conferences, clarity is your best ally. This checklist distills the most important criteria into actionable points, helping you avoid pitfalls and select a platform that delivers value. Think of this as your roadmap to making the right choice.

Core functionalities to prioritize

  • lead capture tools: Ensure the app offers seamless lead capture features, such as QR code scanning or badge integration. If exhibitor-focused tools like momencio are part of your tech stack, make sure the app integrates well for real-time lead management.
  • attendee engagement features: Look for tools like live polls, session feedback, and gamification that enhance interactivity. These keep attendees invested in the event and foster meaningful participation.
  • real-time updates and notifications: A strong notification system ensures everyone stays informed about schedule changes or live updates.

Ease of use and customization

  • intuitive interface: The app should be easy for both attendees and exhibitors to navigate, regardless of technical expertise.
  • branding flexibility: Confirm that the app allows customization to align with your event’s theme and brand identity.
  • multi-user support: Ensure different user types (organizers, exhibitors, attendees) can access features specific to their needs.

Integration and scalability

  • CRM and marketing automation compatibility: The app must integrate with your CRM, such as Salesforce or HubSpot, to streamline follow-ups. Momencio’s seamless integration with such platforms ensures no leads are lost in the process.
  • hybrid readiness: The app should work seamlessly for both in-person and virtual components of hybrid events, offering flexibility as event formats evolve.
  • scalability: Ensure the app can handle different event sizes, from small gatherings to large multi-location conferences.

Analytics and ROI tracking

  • engagement metrics: The app should provide real-time data on session attendance, booth visits, and attendee interactions.
  • ROI visualization: Exhibitors and sponsors need clear, actionable insights on how their investment translated into value. Momencio’s ability to link lead data directly to ROI outcomes is invaluable here.

Reliability and support

  • 24/7 technical support: Events do not stop for glitches. Confirm that the app offers real-time support to handle any issues during critical moments.
  • onboarding and training: Ensure that resources like tutorials, training sessions, or user guides are readily available to help your team and attendees get started smoothly.

Budget and value alignment

  • transparent pricing: Avoid hidden costs by clarifying the app’s pricing structure, including charges for add-ons or premium features.
  • value delivery: Focus on how the app improves attendee experiences and exhibitor outcomes. If tools like momencio are part of your ecosystem, ensure the app complements them by driving engagement and lead conversion.

By keeping this checklist at the forefront, you can make an informed decision that aligns with your event’s goals. The right app is not just a tool—it is an enabler for deeper engagement, stronger connections, and measurable success.

Conclusion

The right event app for conferences is not just a piece of technology; it is an investment in your event’s success. Whether you are an exhibitor looking to generate and nurture leads, an attendee aiming to make meaningful connections, or an organizer managing the complex web of logistics, a well-chosen app transforms potential into results.

Throughout this guide, we have explored the unique role of conferences, how event apps can elevate every aspect of the experience, and what to consider when choosing the ideal platform. At its core, the goal remains the same: to simplify the complexities of events and amplify the impact of every interaction.

Apps like momencio demonstrate how technology can bridge gaps, offering exhibitors tools to capture, engage, and convert leads effortlessly. But no matter the app, the key lies in alignment—choosing a solution that matches your goals, audience, and event structure.

Remember, the success of an event is not measured by attendance alone. It is measured by the relationships built, the knowledge exchanged, and the opportunities seized. The right event app is your silent partner in making all of that possible.

Ready to take the next step? Explore how momencio can help transform your event strategy. Book a demo today and start turning every event into a growth engine.

related articles

◗◗empower your sales and marketing efforts

momencio
Free ebook - Don’t miss out!
the ultimate momencio faqs: mastering event lead management and conversion
The Ultimate momencio FAQs Mastering Event Lead Management and Conversion

Get to know momencio and why you need this event tool for sales

momencio is a revolutionary platform designed to bridge the event and sales gap, offering a holistic approach to event lead management and conversion.

*required: please add your full name and work email and we will send you a download link

About the game: Scratch for Cheer

Welcome to Scratch for Cheer!

The holidays are a time to give and celebrate, and we at momencio want to share the cheer with you! Join our festive game, leave reviews about your experience with momencio, and unlock rewards in the form of Amazon gift cards. The more platforms you choose to review, the more cheer you unlock! Plus, you can earn extra rewards by inviting coworkers to join in the fun.

Here’s everything you need to know to participate, win, and share the cheer!

How to play

  1. Start the Game:
    • Visit the game microsite and click “Play Now”.
  2. Select Review Platforms:
    • Choose the platforms where you’ll write your reviews.
    • You can select one or more from the following:
    • Your reward depends on the number of platforms you select and complete reviews for, so choose wisely!
  3. Scratch & Reveal:
    • Play the scratch card game to discover your potential reward. This adds excitement to the experience while keeping your reward a surprise!
  4. Provide Your Details:
    • Enter your full name, company name, and work email address (personal email addresses will not be accepted).
    • This information ensures we can validate your participation and send your reward.
  1. Spread the Cheer for Bonuses:
    • Once you finish, you’ll receive a unique referral link. Share this link with your coworkers and invite them to join.
    • For every coworker who uses your link, participates, and submits proof of at least one review, you’ll earn an additional $15 bonus added to your reward!
  2. Write & Publish Your Reviews:
    • Share your experience with momencio on the platforms you selected. Make sure your reviews are thoughtful and compliant with the guidelines of each platform.
  3. Submit Proof of Your Reviews: After publishing your reviews, email proof to cheer@momencio.com. Your proof should include:
    • A screenshot or direct link for each review.
    • Your name as it appears in the review.
    • The date of the review (must be after the start of the game).

How you win

  • Your reward is based on the number of platforms you selected and submitted verified reviews for.
  • Rewards are issued as Amazon gift cards to your work email address.


Important:

  • If you select multiple platforms but do not submit proof for all of them, your reward will be adjusted to match the verified reviews. For example: If you select three platforms but submit proof for only two, your reward will correspond to the two verified reviews.
  • No proof submitted? No reward will be issued.

Terms & Conditions

  1. Eligibility:
    • Participants must be existing momencio clients or users or have seen momencio in a demo.
    • Reviews must be genuine and adhere to the review guidelines of each platform.
  2. Proof of Reviews:
    • Proof must be submitted by January 7, 2025, and include screenshots or direct links showing:
      • Your review.
      • Your name as it appears in the review.
      • The date of the review.
  3. Referral Bonus:
    • Referrals must be made using the unique link provided at the end of the game.
    • For each coworker who joins and submits proof of at least one review, you’ll earn an additional $15 bonus.
    • Referrals made without your unique link cannot be verified and will not qualify for the bonus.
  1. Reward delivery:
    • Rewards will be sent as Amazon gift cards to the work email address you provided.
    • All rewards will be issued by January 15, 2025, after reviews and referrals are verified.
  2. Fraud prevention:
    • Any attempts to submit false, incomplete, or plagiarized reviews will result in disqualification.
    • momencio reserves the right to verify the authenticity of all reviews and referrals.
  3. Game deadline:
    • The game ends on January 7, 2025. No submissions will be accepted after this date.
Key dates to remember
  • Game Ends: January 7, 2025
  • Reward Distribution: January 15, 2025
Need help? For questions or support, contact us at support@momencio.com.

momencio - AI Lead Enrichment

Overview

The AI Lead Enrichment is a proprietary service of momencio designed to simplify and enhance the
process of capturing and enriching lead information at any type of event.

By using momencio’s mobile or tablet app, you can use the device’s camera to take a clear picture of any form of identification, including, but not limited to, name tags/event badges/business cards. Our AI-driven service leverages OCR technology to identify any information captured and map any relevant data to a contact record. The contact record is then fed to our Lead Enrichment service, which creates a more complete contact record. The process provides exhibitors with the most accurate and up-to-date contact details available.

The Reality of Event Data Collection

In the dynamic environment of event floors, achieving perfect data accuracy can sometimes be challenging. Both traditional lead capture methods using event APIs and AI Lead Enrichment strive for
high accuracy, but various factors can impact the data collected:

  • Personal Email Usage: Some attendees register with personal email addresses.
  • Name Misspellings: Minor errors can occur during registration.
  • Generic Email Addresses: Use of addresses like marketing@domain.com.
  • Broad Registration Categories: Attendees might register under general titles (e.g., Biomedical
    Student).
  • Complex Company Structures: Companies with multiple sub-companies can complicate data
    accuracy.

     

AI Lead Enrichment is specifically designed to manage these scenarios, continually learning and
adapting to improve its accuracy.

Advanced Services for Lead Enrichment

AI Lead Enrichment leverages a suite of advanced tools and services to ensure the highest quality data retrieval:

  • Machine Learning: Continuously improves the accuracy of lead data.
  • AI (Artificial Intelligence): Enhances basic information with additional details.
  • Data Enrichment: Adds valuable contact details to enhance lead profiles.
  • LinkedIn Services: Provides up-to-date professional profiles.

Our Commitment to Excellence

AI Lead Enrichment excels in providing accurate data, yet certain edge cases may present challenges. These include:

  • Private LinkedIn Profiles: Some professional details might be inaccessible.
  • Personal Email Addresses: When registrants use personal rather than business emails.
  • Small-Scale Businesses: Limited online presence can affect data richness.
  • Self-Employed Individuals: Lack of company affiliation might limit available data.
  • Event Staff Contacts: Scanned badges may occasionally belong to event staff.
  • Extensive Sub-Company Networks: Complexity in identifying the correct entity.
  • Security-Sensitive Industries: Industries like military or government may have restricted
    information.


Despite these potential challenges,
AI Lead Enrichment strives to provide the best possible data,
ensuring valuable insights for effective follow-ups.

How AI Lead Enrichment Enhances Your Event Strategy

  1. Data Capture: Seamlessly capture attendee information such as first name, last name, and
    company name.
  2. Data Enrichment: Utilize AI to enhance this basic information with additional details like
    business email and LinkedIn profile.
  3. Immediate Engagement: Send personalized follow-up emails and provide links to personalized
    microsites to maintain engagement.

     

momencio’s AI Lead Enrichment innovative technology ensures high data accuracy and enrichment, significantly improving your follow-up strategies and boosting overall event ROI.

By operating independently of event-specific APIs, ULC offers versatility across various events while enhancing your lead capture and engagement efforts.

Additional Information on Event APIs

Traditional event APIs play a crucial role in modern event management, facilitating tasks like attendee data collection and session tracking. However, there are common challenges associated with these APIs:

  • Data Delays: Delays in data delivery can affect timely decision-making.
  • Inconsistent Data Quality: Variability in data quality can undermine event analytics.
  • Misleading Event Data: Issues like duplicates can lead to inaccurate attendee estimates.
  • Limited Data Scope: Traditional APIs might miss crucial information that enhances attendee
    engagement and event ROI.

     

momencio’s AI Lead Enrichment overcomes these challenges by offering enriched data with high
accuracy, making it a versatile and cost-effective alternative to traditional event APIs.

How AI Lead Enrichment Works

  1. Data Capture: Captures attendee information, including first name, last name, and company
    name.
  2. Data Enrichment: Enhances basic information with additional details like business email and
    LinkedIn profile.
  3. Immediate Engagement: Sends personalized follow-up emails and links to personalized
    microsites for continued engagement.

By leveraging momencio’s AI Lead Enrichment, you can transform event interactions into meaningful business opportunities, ensuring every lead is accurately captured and effectively engaged

free download
...

please add your full name and work email to download the pdf