Acc.elerometer vs i
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Acc.elerometer
Visualize and record device motion with live sensor readings. Analyze acceleration, rotation, magnetic field, and attitude. Export data as CSV for further analysis.
- Live sensor readings
- Record experiments
- Analyze results on iPhone/iPad
- Capture motion on Apple Watch
- Export data as CSV
- Six measurement types
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See how your device moves with Acc.elerometer. View live sensor readings, record an experiment and examine the results on your iPhone or iPad. Capture motion on Apple Watch and send recordings to your paired iPhone for charts and CSV export. EXPLORE SIX MEASUREMENTS - Acceleration, including gravity, in G - User acceleration, with gravity removed, in G - Rotation rate around three axes in rad/s - Magnetic field in microteslas - Device attitude: roll, pitch and yaw in radians - Gravity along each axis in G View individual axes and vector magnitude where supported. Follow changing values and review recorded measurements to explore movement, rotation and orientation. RECORD AND REVIEW Choose the measurements you want to capture, then start and stop a recording. On iPhone and iPad, set the measurement interval from 0.1 to 1 second. Open saved recordings to inspect charts, switch between individual axes and vector magnitude for supported measurements, and identify gaps in the data. EXPORT YOUR DATA Export each measurement from a recording as a CSV file with timestamps and axis values. Choose Unix time, spreadsheet serial dates or formatted date strings for your analysis workflow. CAPTURE MOTION ON APPLE WATCH View sensor readings and record selected measurements on your wrist. Send saved recordings to the paired iPhone and follow transfer progress. Add watch face complications to see saved sensor maxima or recording status, and open the app to start a recording from the recording widget. FOR EXPERIMENTS AND EVERYDAY CURIOSITY Explore device motion for a physics demonstration, a development project or your own experiments. Measurements and recordings are stored on your devices. No account is required. Available readings and actual sampling intervals depend on the device and its sensors. Apple Watch recording duration is subject to watchOS background runtime limits. Watch complications show saved values from the app, rather than a continuous live sensor feed.
i
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Allows storage and management of giftcards, which are bought in the store of our partner.
Screenshots
Verdict
The clearest difference is update cadence: i at every 6 weeks against Acc.elerometer's every 11 months. i also leads on iOS requirement (13.0 vs 26.0). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Acc.elerometer ships an update every 11 months, i every 6 weeks. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.
| Parameter | Acc.elerometer | i |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 26.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 18 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Pantiukhin Andrei | Arev Software GmbH |
In-app purchases
Acc.elerometer
No in-app purchases
i
No in-app purchases
