Comparison

phyphox vs GoodGeometry

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Pre-defined experiments
  • Data export (CSV, TSV, Excel)
  • Web-based remote control
  • Custom experiment editor
  • Access to phone sensors
  • Advanced analysis functions
Features
Read full description

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.

About

GoodGeometry

Enhance geometry tasks within GoodNotes with infinitely zoomable tools, paper templates, and cover designs. Create custom templates and covers with editable patterns. Export your work as zoomable PDFs for versatile use.

Highlights
  • Infinitely zoomable geometric tools
  • Customizable paper templates
  • Editable cover designer
  • Zoomable PDF export
  • Multiple tool designs
  • GoodNotes and collection file formats
Features
Read full description

With GoodGeometry tools, geometry tasks in Goodnotes can be easily edited at correct scale. Geometry tools, paper templates and covers design tools for students, teachers and presentations. All tools, templates and covers are infinitely zoomable without loss of sharpness Export as zoomable PDF - can be used anywhere ■ Geometric triangles (Geodreieck) ■ Compasses ■ Rulers (1/10 millimeter scale) ■ Protractors ■ Paper templates in the correct scale ■ Paper template designer - choose your own colors and line thicknesses ■ Cover Designer with pattern generators - everything editable Choose your favorite tool from many different designs. You get all the tools in two file formats: ■ goodnotes files: You can share .goodnotes files directly with Goodnotes. ■ collection files: First, save .collection files to your files. Then create a new sticker in Goodnotes and import them into the sticker. Easily share all templates and covers with any program of your choice. How to do this is explained in the app. Please also watch our tutorial videos. No in-app purchases, no advertising! Privacy policy: https://www.iubenda.com/privacy-policy/51617525 Terms of use: https://www.iubenda.com/terms-and-conditions/51617525

Screenshots

phyphox4 screens
GoodGeometry4 screens

Verdict

The call

The clearest difference is price: phyphox at Free against GoodGeometry's $3.99. phyphox also leads on rating (4.6 vs 1.2) and ratings volume (276 vs 5). On update cadence, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

phyphox is free to download; GoodGeometry costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

phyphox holds the better App Store score, 4.6 against 1.2. That said, the two scores are not equally well evidenced: phyphox has 276 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 79% of phyphox's written reviews are positive against 64% of GoodGeometry's.

UpkeepUpdate frequency

phyphox ships an update every 3 months, GoodGeometry every 2 months. Both last shipped on October 12, 2026.

Scorecard6 real differences · 4 level
phyphox versus GoodGeometry: the parameters behind the verdict, then further details
ParameterphyphoxGoodGeometry
PriceFree — better$3.99
Rating4.6 (276 ratings) — better1.2 (5 ratings)
Positive reviews78.7% of reviews — better64.3% of reviews
Number of ratings276 — better5
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.4
Further details — not scored
Size19 MB1.3 GB
Age rating4+4+
DeveloperRWTH Aachen UniversityBirgit Stock

Customer experience

phyphox

All ratings276 ratings
Positive89.5%
Neutral4.0%
Negative6.5%
Written reviews267 reviews
Positive78.7%
Neutral3.4%
Negative18.0%

GoodGeometry

All ratings5 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews28 reviews
Positive64.3%
Neutral0.0%
Negative35.7%

Bugs and requests

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 more
  • 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 more
  • 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

GoodGeometry

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

phyphox

No in-app purchases

None

GoodGeometry

No in-app purchases

Questions

Is phyphox free?
phyphox is free to download, with no in-app purchases.
Is GoodGeometry free?
GoodGeometry costs $3.99, with no in-app purchases.
Which has better reviews, phyphox or GoodGeometry?
phyphox is rated higher. phyphox averages 4.6 out of 5 from 276 ratings, while GoodGeometry averages 1.2 from 5 ratings.
Do phyphox or GoodGeometry have ads?
Neither phyphox nor GoodGeometry shows ads.
Which is updated more often, phyphox or GoodGeometry?
phyphox ships an update every 3 months, and GoodGeometry every 2 months. Most recently, phyphox was updated on October 12, 2026 and GoodGeometry on October 12, 2026.

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