# Watch Sensor Logger vs Physics Labs

The clearest difference is review sentiment: Physics Labs at 100% against Watch Sensor Logger's 50%. Physics Labs also leads on update cadence (every 2 weeks vs every 25 months) and iOS requirement (15.6 vs 17.0). Watch Sensor Logger's advantage is monetization model (free vs ad-supported). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Watch Sensor Logger ships an update every 25 months, Physics Labs every 2 weeks. The most recent releases landed on August 8, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | Watch Sensor Logger | Physics Labs |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 25 months | **Every 2 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 17 MB | 32 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [yuya kanbetsunawa](https://appshunter.io/developer/1597026161) | [Huseyin Aykut Uludag](https://appshunter.io/developer/1469165629) |

## What reviewers say

### Watch Sensor Logger

[App page](https://appshunter.io/ios/app/watch-sensor-logger/id1634449655)

Log detailed motion and GPS data from your Apple Watch. Export sensor readings like acceleration, attitude, and location as a CSV file for analysis. This app is exclusively designed for Apple Watch.

**Highlights:** Log sensor data, GPS tracking, Export to CSV, Acceleration logging, Attitude data, Time stamping

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Physics Labs

[App page](https://appshunter.io/ios/app/physics-labs/id6472849584)

This app uses your device's sensors to measure various physical quantities like acceleration, magnetic fields, and sound levels. View data in coordinates or scalar magnitude, and export it to Excel for analysis. It's a digital lab for your phone.

**Highlights:** Measure acceleration, magnetic fields, and sound levels, View data in X, Y, Z coordinates or scalar magnitude, Export sensor data to Excel for analysis, Eliminate gravity from acceleration measurements, Measure atmospheric pressure

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Watch Sensor Logger free?

Watch Sensor Logger is free to download, with no in-app purchases.

### Is Physics Labs free?

Physics Labs is free to download, with no in-app purchases.

### Do Watch Sensor Logger or Physics Labs have ads?

Both Watch Sensor Logger and Physics Labs show ads.

### Which is updated more often, Watch Sensor Logger or Physics Labs?

Watch Sensor Logger ships an update every 25 months, and Physics Labs every 2 weeks. Most recently, Watch Sensor Logger was updated on August 8, 2026 and Physics Labs on June 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*