# Watch Sensor Logger vs PDR測位

The clearest difference is ads: PDR測位 at none against Watch Sensor Logger's shown. PDR測位 also leads on update cadence (every 12 months vs every 25 months). On price, in-app purchases, device support and iOS requirement 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, PDR測位 every 12 months. The most recent releases landed on October 10, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Watch Sensor Logger | PDR測位 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 25 months | **Every 12 months** |
| Monetization | Free | — |
| Size | 17 MB | 3 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [yuya kanbetsunawa](https://appshunter.io/developer/1597026161) | [Musen Connect, Inc.](https://appshunter.io/developer/1570398182) |

## 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


### PDR測位

[App page](https://appshunter.io/ios/app/pdr/id6448334677)

**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 PDR測位 free?

PDR測位 is free to download, with no in-app purchases.

### Do Watch Sensor Logger or PDR測位 have ads?

Watch Sensor Logger shows ads; PDR測位 does not.

### Which is updated more often, Watch Sensor Logger or PDR測位?

Watch Sensor Logger ships an update every 25 months, and PDR測位 every 12 months. Most recently, Watch Sensor Logger was updated on October 10, 2026 and PDR測位 on October 19, 2026.

---

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