# Strobr Scope vs Watch Sensor Logger

The clearest difference is ads: Strobr Scope at none against Watch Sensor Logger's shown. Strobr Scope also leads on update cadence (every 12 months vs every 25 months) and iOS requirement (10.0 vs 17.0). On price, in-app purchases, monetization model 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.

Strobr Scope ships an update every 12 months, Watch Sensor Logger every 25 months. The most recent releases landed on June 1, 2026 and August 8, 2026 respectively.

## The numbers

| Metric | Strobr Scope | Watch Sensor Logger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/strobr-scope/id1330331187/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 12 months** | Every 25 months |
| Monetization | Free | Free |
| Size | 14 MB | 17 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Zhang](https://appshunter.io/developer/1418087801) | [yuya kanbetsunawa](https://appshunter.io/developer/1597026161) |

## What reviewers say

### Strobr Scope

[App page](https://appshunter.io/ios/app/strobr-scope/id1330331187)

This utility app uses your device's camera to measure the frequencies of various cycles, including rotational speeds and electrical light frequencies. It offers a more convenient and less distracting alternative to traditional stroboscopes, capable of measuring even very slow rotations.

**Highlights:** Camera-based stroboscope, Measures rotational frequencies, Measures electrical light frequencies, Measures slow rotations, Continuously variable frame rates, Convenient and less distracting

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Strobr Scope free?

Strobr Scope is free to download, with no in-app purchases.

### Is Watch Sensor Logger free?

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

### Do Strobr Scope or Watch Sensor Logger have ads?

Watch Sensor Logger shows ads; Strobr Scope does not.

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

Strobr Scope ships an update every 12 months, and Watch Sensor Logger every 25 months. Most recently, Strobr Scope was updated on June 1, 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.*