# SensorLog vs OpenPPG

The clearest difference is price: OpenPPG at Free against SensorLog's $2.99. OpenPPG also leads on in-app purchases (none vs 4). SensorLog's advantage is chart position (#96 vs unranked) and device support (3 vs 1). On update cadence, ads and iOS requirement there is nothing between them.

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

SensorLog ships an update every 2 months, OpenPPG monthly. The most recent releases landed on September 26, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | SensorLog | OpenPPG |
| --- | --- | --- |
| 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 | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#96** | — |
| Size | 4 MB | 9 MB |
| Requires iOS | 18.0 | **17.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Bernd Thomas](https://appshunter.io/developer/385441510) | [research app](https://appshunter.io/developer/1807596075) |

## What reviewers say

### SensorLog

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

**Currently charting:** #96 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 |


### OpenPPG

[App page](https://appshunter.io/ios/app/openppg/id6744415040)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SensorLog free?

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

### Is OpenPPG free?

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

### Do SensorLog or OpenPPG have ads?

Neither SensorLog nor OpenPPG shows ads.

### Which is updated more often, SensorLog or OpenPPG?

SensorLog ships an update every 2 months, and OpenPPG monthly. Most recently, SensorLog was updated on September 26, 2026 and OpenPPG on September 24, 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.*