# SensorLog vs IMU Step

The clearest difference is price: IMU Step at Free against SensorLog's $2.99. IMU Step also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 4). SensorLog's advantage is update cadence (every 2 months vs every 8 months) and ratings volume (40 vs 3). On ads and device support there is nothing between them.

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

IMU Step holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: SensorLog has 40 ratings behind it against 3, so its average is the more settled of the two.

SensorLog ships an update every 2 months, IMU Step every 8 months. The most recent releases landed on September 30, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | SensorLog | IMU Step |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.4 (40 ratings)](https://appshunter.io/ios/app/sensorlog/id388014573/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/imu-step/id1348032758/reviews)** |
| Number of ratings | **40** | 3 |
| Positive reviews | 69.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#181** | — |
| Size | 4 MB | 31 MB |
| Requires iOS | 18.0 | **14.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bernd Thomas](https://appshunter.io/developer/385441510) | [I Measure U](https://appshunter.io/developer/1035194936) |

## What reviewers say

### SensorLog

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

**Currently charting:** #181 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 |


### IMU Step

[App page](https://appshunter.io/ios/app/imu-step/id1348032758)

This app helps injured athletes return to play by analyzing their movement with waterproof sensors. It provides precise load metrics and identifies asymmetries in lower limbs, offering actionable insights through cloud-based dashboards. Monitor live data, record video, and download sensor data for detailed analysis.

**Highlights:** Real-time load metric analysis, Lower limb asymmetry identification, Cloud-based dashboard insights, Live data streaming, Session video recording, Sensor data download

**In-app purchases:** none


## Frequently asked questions

### Is SensorLog free?

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

### Is IMU Step free?

IMU Step is free to download, with no in-app purchases.

### Which has better reviews, SensorLog or IMU Step?

IMU Step is rated higher. SensorLog averages 4.4 out of 5 from 40 ratings, while IMU Step averages 5.0 from 3 ratings.

### Do SensorLog or IMU Step have ads?

Neither SensorLog nor IMU Step shows ads.

### Which is updated more often, SensorLog or IMU Step?

SensorLog ships an update every 2 months, and IMU Step every 8 months. Most recently, SensorLog was updated on September 30, 2026 and IMU Step on June 1, 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.*