# Senstream vs OEI Sim Pro

The clearest difference is update cadence: Senstream at every 3 months against OEI Sim Pro's every 23 months. Senstream also leads on device support (4 vs 1). OEI Sim Pro's advantage is iOS requirement (14.1 vs 17.6). On price, ads and in-app purchases 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, OEI Sim Pro every 23 months. The most recent releases landed on September 19, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Senstream | OEI Sim Pro |
| --- | --- | --- |
| 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 23 months |
| Monetization | Free | — |
| Size | 19 MB | 112 MB |
| Requires iOS | 17.6 | **14.1** |
| Devices | **iPhone, iPad, Mac, Vision Pro** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Senstream, Inc.](https://appshunter.io/developer/1297743397) | [Operative Experience Inc](https://appshunter.io/developer/1309239394) |

## 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


### OEI Sim Pro

[App page](https://appshunter.io/ios/app/oei-sim-pro/id1576212260)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Senstream free?

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

### Is OEI Sim Pro free?

OEI Sim Pro is free to download, with no in-app purchases.

### Do Senstream or OEI Sim Pro have ads?

Neither Senstream nor OEI Sim Pro shows ads.

### Which is updated more often, Senstream or OEI Sim Pro?

Senstream ships an update every 3 months, and OEI Sim Pro every 23 months. Most recently, Senstream was updated on September 19, 2026 and OEI Sim Pro on September 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.*