# Senstream vs PIEL Data

The clearest difference is update cadence: PIEL Data at every 5 weeks against Senstream's every 3 months. Senstream's advantage is device support (4 vs 2). On price, ads, in-app purchases 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.

Senstream ships an update every 3 months, PIEL Data every 5 weeks. The most recent releases landed on September 19, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Senstream | PIEL Data |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/senstream/id1297743398/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 19 MB | 3 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Senstream, Inc.](https://appshunter.io/developer/1297743397) | [Blue Jay Ventures Pty Ltd](https://appshunter.io/developer/951242850) |

## What reviewers say

### Senstream

[App page](https://appshunter.io/ios/app/senstream/id1297743398)

This app records physiological signal data from a wearable ring, capturing electrodermal activity, ECG, PPG, temperature, and motion. It connects to the cloud for powerful data analysis, enabling new types of research.

**Highlights:** Electrodermal activity (EDA/GSR) capture, ECG and PPG data recording, Temperature and motion sensing, Mobile and cloud data synchronization, BIOPAC integration

**In-app purchases:** none


### PIEL Data

[App page](https://appshunter.io/ios/app/piel-data/id6450528453)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Senstream free?

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

### Is PIEL Data free?

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

### Do Senstream or PIEL Data have ads?

Neither Senstream nor PIEL Data shows ads.

### Which is updated more often, Senstream or PIEL Data?

Senstream ships an update every 3 months, and PIEL Data every 5 weeks. Most recently, Senstream was updated on September 19, 2026 and PIEL Data on September 17, 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.*