Top Hat vs IUDM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Top Hat
Enhance your learning experience with interactive resources, in-class participation tools, and dynamic digital textbooks. Engage with professors and peers, and test your knowledge with quizzes and polls to improve comprehension and retention.
- Follow lecture slides on your device
- In-class response system
- In-app discussions with peers and professors
- Dynamic, interactive digital textbooks
- Take polls and quizzes
- Access graded and non-graded homework
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Top Hat is the perfect companion app to our comprehensive assessment platform that helps you learn better before, during and after class. Top Hat makes learning fun and engaging (seriously!) and sets you up for success, helping you connect with your professors, your peers and the content you’re learning in and out of the classroom. Here’s what Top Hat offers you: Compelling resources, delivered on your smartphone or laptop: • Follow your prof’s lecture slides on your own device • Contribute in class with an easy-to-use response system that’s always with you • Participate with your profs and peers using in-app discussions Content tailored to your course: • Experience dynamic, interactive textbooks loaded up with images, videos, audio clips and more • Read your digital materials from anywhere and keep them forever Quizzes, tests and polls that improve learning comprehension: • Challenge yourself by taking polls and quizzes on your own devices • Improve your knowledge retention with interactive assessment elements • Check for gaps in your understanding with graded and non-graded homework and short quizzes Thanks for using Top Hat. As you experience the app, we’d love to get your feedback: support@tophat.com or follow us on Instagram, Twitter or Facebook @TopHat
IUDM
This app serves as a central hub for Indiana University Dance Marathon participants. It provides access to important announcements, event schedules, fundraising tools, and information about the organization's mission. It complements the DonorDrive account for registered users.
- Important announcements
- Upcoming event schedules
- Fundraising resources
- Learn about IUDM's mission
- Connect with other participants
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The official Indiana University Dance Marathon (IUDM) app. Committee members, chairs, and external dancers can stay connected with everything IUDM in one place. View important announcements and upcoming events, find fundraising resources, learn more about IUDM's mission, and more. The IUDM app is designed to complement your DonorDrive account, not replace it. Before signing in to the app, all participants must first register for IUDM through DonorDrive at iudm.org/register. Indiana University Dance Marathon (IUDM) is Indiana University's largest student organization and the second-largest student-run philanthropy in the world. Since 1991, IUDM has raised more than $59 million to support Riley Hospital for Children and the IU School of Medicine Wells Center for Pediatric Research. Each year, nearly 3,000 students come together for a 36-hour Dance Marathon, united For The Kids.
Screenshots
Verdict
The clearest difference is rating: IUDM at 5.0 against Top Hat's 4.6. IUDM also leads on update cadence (every 6 days vs every 2 weeks) and iOS requirement (15.0 vs 17.0). Top Hat's advantage is ratings volume (23K vs 3) and chart position (#198 vs unranked). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
IUDM holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Top Hat has 23K ratings behind it against 3, so its average is the more settled of the two.
Top Hat ships an update every 2 weeks, IUDM every 6 days. The most recent releases landed on October 16, 2026 and October 1, 2026 respectively.
| Parameter | Top Hat | IUDM |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (23K ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 14.6% of reviews | — |
| Number of ratings | 23K — better | 3 |
| Update frequency | Every 2 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #198 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 152 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Top Hat Monocle | Indiana University Dance Marathon, LLC |
Customer experience
Top Hat
IUDM
Bugs and requests
Top Hat
Reported bugs
3 issues- Answers not registering correctly
- Slides not loading properly on mobile devices
- Inconsistent performance across platforms
Requested features
3 requests- Add page numbers and search functionality to ebooks
- Improve syncing between mobile and web versions
- Allow more flexible location settings for attendance
IUDM
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Top Hat
No in-app purchases
IUDM
No in-app purchases









