# SensorLog vs Watch Sensor Logger

The clearest difference is price: Watch Sensor Logger at Free against SensorLog's $2.99. Watch Sensor Logger also leads on in-app purchases (none vs 4). SensorLog's advantage is ads (none vs shown) and update cadence (every 2 months vs every 25 months). On device support and iOS requirement there is nothing between them.

Watch Sensor Logger is free to download; SensorLog costs $2.99 up front. SensorLog sells 4 one-off in-app purchases. Watch Sensor Logger asks for nothing beyond the download.

SensorLog ships an update every 2 months, Watch Sensor Logger every 25 months. The most recent releases landed on September 21, 2026 and August 8, 2026 respectively.

## The numbers

| Metric | SensorLog | Watch Sensor Logger |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.4 (40 ratings)](https://appshunter.io/ios/app/sensorlog/id388014573/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | **69.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 25 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#135** | — |
| Size | 4 MB | 17 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Bernd Thomas](https://appshunter.io/developer/385441510) | [yuya kanbetsunawa](https://appshunter.io/developer/1597026161) |

## What reviewers say

### SensorLog

[App page](https://appshunter.io/ios/app/sensorlog/id388014573)

**Currently charting:** #135 Top Paid · Utilities (US App Store)

Record and stream sensor data from your iPhone, iPad, and Apple Watch. Export data in CSV or JSON format, or send it via TCP, UDP, or HTTP requests. Integrates with Core ML models for advanced analysis.

**Highlights:** Log sensor data up to 100Hz, Stream data via TCP/UDP or HTTP, Export data as CSV or JSON, Remote client/server functionality, Siri and Shortcuts integration, Core ML model support, HealthKit data export from Apple Watch

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a Coffee ... | $0.99 | one-time |
| Spend me an Ice Cream ... | $1.99 | one-time |
| Offer me a glas of Wine ... | $5.99 | one-time |
| Invite me for a Cocktail ... | $9.99 | one-time |


### 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


## Frequently asked questions

### Is SensorLog free?

SensorLog costs $2.99, and also offers in-app purchases.

### Is Watch Sensor Logger free?

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

### Do SensorLog or Watch Sensor Logger have ads?

Watch Sensor Logger shows ads; SensorLog does not.

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

SensorLog ships an update every 2 months, and Watch Sensor Logger every 25 months. Most recently, SensorLog was updated on September 21, 2026 and Watch Sensor Logger on August 8, 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.*