Top Hat vs phyphox
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
phyphox
Unlock your phone's sensors for scientific exploration. Conduct pre-built experiments or create your own using accelerometers, magnetometers, and more. Analyze and export data in various formats for further study.
- Pre-defined experiments
- Data export (CSV, TSV, Excel)
- Web-based remote control
- Custom experiment editor
- Access to phone sensors
- Advanced analysis functions
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Did you know that you are carrying a 3D magnetometer? That you can use your phone as a pendulum to measure earth's local gravitational acceleration? That you can turn your phone into a sonar? phyphox gives you access to the sensors of your phone either directly or through ready-to-play experiments which analyze your data and let you export raw data along with the results for further analysis. You can even define your own experiments on phyphox.org and share them with colleagues, students and friends. Selected Features: • A selection of pre-defined experiments. Just press play to start. • Export your data to a range of widely used formats • Remote-control your experiment through a web interface from any PC on the same network as your phone. No need to install anything on those PCs - all you need is a modern web browser. • Define your own experiments by selecting sensor inputs, defining analysis steps and creating views as an interface using our web-editor (http://phyphox.org/editor). The analysis consists of just adding two values or using advanced methods like Fourier transforms and crosscorrelation. We offer a whole toolbox of analysis functions. Sensors supported: • Accelerometer • Magnetometer • Gyroscope • Pressure • Microphone • Proximity • GPS • Camera • LiDAR/ToF *some sensors are not present on every phone. Export formats • CSV (Comma separated values) • TSV (Tab-separated values) • Excel (if you need other formats, please let us know) This app has been developed at the 2nd Institute of Physics A at the RWTH Aachen University.
Screenshots
Verdict
Top Hat and phyphox both sit at 4.6 stars, but that hides the real split: 79% of phyphox's written reviews are positive against 15% of Top Hat's. phyphox also leads on iOS requirement (12.0 vs 17.0). Top Hat's advantage is update cadence (fortnightly vs every 3 months) and ratings volume (23K vs 276). On price, rating, ads and in-app purchases 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.
On the App Store both sit at effectively the same score — 4.6 for Top Hat against 4.6 for phyphox. That said, the two scores are not equally well evidenced: Top Hat has 23K ratings behind it against 276, so its average is the more settled of the two. Written reviews are what separate them: 15% of Top Hat's written reviews are positive against 79% of phyphox's.
Top Hat ships an update fortnightly, phyphox every 3 months. Both last shipped on October 12, 2026.
| Parameter | Top Hat | phyphox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (23K ratings) | 4.6 (276 ratings) |
| Positive reviews | 14.6% of reviews | 78.7% of reviews — better |
| Number of ratings | 23K — better | 276 |
| Update frequency | Fortnightly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #181 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 162 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | Top Hat Monocle | RWTH Aachen University |
Customer experience
Top Hat
phyphox
User reviews
Top Hat
From 23K App Store ratingsWhat we love
- 🚀 Smooth and intuitive interface
- 👍 Useful for attendance and in-class quizzes
- 💡 Potential for interactive learning
Room to improve
- 🐛 Frequent crashes and bugs
- 🔋 High battery consumption
- 💰 Expensive subscription fees
- 🔒 Privacy concerns with location tracking
phyphox
From 276 App Store ratingsWhat we love
- 💡 Access to phone sensors
- 🔬 Useful for physics experiments
- 📊 Data logging and export
- 🆓 Free and no ads
- 🤔 Sparks curiosity
Room to improve
- 🐛 Bugs and crashes
- 📉 Inconsistent performance
- 🔒 App locks/minimizes recording
- ❓ Units not always clear
- ⚠️ Potential for device damage
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
phyphox
Reported bugs
21 issues- App crashes on older devices
- Barometer not working on iOS 17.4
- Network error: Generic error
- Sound measurement curve disappears
- App crashes frequently
Show 16 moreShow fewer
- Cannot be opened on iPhone 6
- Light sensor not implemented
- Recording stops when phone is locked or app is minimized
- Green lines on screen and faded to black after using barometer sensor
- WLAN not working after using the app
- Pressure no longer displayed on iOS 17.5
- Barometer not working on iOS 17.4
- Latest version cannot be opened on iPhone 6
- Sound chronometer reset button not working
- iPad destroyed after update
- App displays Russian language by default
- Experiments not working on iPhone 7
- Magnetometer not working after update on iPhone 5s
- GPS shows 0 satellites with 6m accuracy
- App claims iPhone 11 is comparable to a low-cost tablet
- App crashes every time
Requested features
33 requests- Add infrasound detector
- More units of measurement (G-force, PSI, feet)
- NFC/RFID support
- In-app bug report feature
- Allow other sensors via USB-C
Show 28 moreShow fewer
- Ability to plug in external sensors
- Slo-mo recording with timestamps
- Add attitude sensor (roll, pitch, yaw)
- Integration with Apple Shortcuts
- Ability to record audio/dB simultaneously with other sensors
- Adjustable sampling frequency for all sensors
- Dark mode option
- Experiment editor integrated into the app
- More documentation for the editor
- Ability to form averages
- Support for older iPhones (iPhone 6)
- Add GPS satellite count display
- Add speedometer functionality
- Add Lux measurement using light sensor/camera
- Ability to play recorded audio
- Limit input for sound analyzers (dB/Hz range)
- Wi-Fi and RF module access for EMF analysis
- iWatch integration
- Improve audio generator capability
- Allow background/screen locked recording
- Add light sensor functionality
- Change units of measurement
- Add more precise measurements for static cases
- Add FFT and spectral generation for accelerometer
- Support for older devices
- Improve UI/UX for new users
- Add support for more languages
- Add a donate option
In-app purchases
Top Hat
No in-app purchases
phyphox
No in-app purchases







