# S2M vs Blue Pebbles

The clearest difference is rating: Blue Pebbles at 5.0 against S2M's 4.0. Blue Pebbles also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). S2M's advantage is update cadence (every 4 days vs every 4 months) and ratings volume (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Blue Pebbles holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

S2M ships an update every 4 days, Blue Pebbles every 4 months. The most recent releases landed on September 5, 2026 and June 26, 2026 respectively.

## The numbers

| Metric | S2M | Blue Pebbles |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/s2m/id1359042934/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/blue-pebbles/id1624698212/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 4 months |
| Monetization | Free | Free |
| Size | 107 MB | 37 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Smart2Move AG](https://appshunter.io/developer/1115139366) | [AON2 LTD](https://appshunter.io/developer/1444878946) |

## What reviewers say

### S2M

[App page](https://appshunter.io/ios/app/s2m/id1359042934)

Analyze ground reaction forces from athletes using a Smart2Move Dual Force Plates system. Connect wirelessly to your iPad to view and interpret player data.

**Highlights:** Wireless iPad connectivity, Analyze ground reaction forces, Dual Force Plates system integration, Player performance measurement, Data interpretation

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

**In-app purchases:** none


### Blue Pebbles

[App page](https://appshunter.io/ios/app/blue-pebbles/id1624698212)

This app serves as a companion to the Brilliant Pebbles audible altimeter. It enhances the functionality and user experience of the altimeter device.

**Highlights:** Companion app functionality, Enhances altimeter device, Audible altimeter integration

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is S2M free?

S2M is free to download, with no in-app purchases.

### Is Blue Pebbles free?

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

### Which has better reviews, S2M or Blue Pebbles?

Blue Pebbles is rated higher. S2M averages 4.0 out of 5 from 3 ratings, while Blue Pebbles averages 5.0 from 1 ratings.

### Do S2M or Blue Pebbles have ads?

Neither S2M nor Blue Pebbles shows ads.

### Which is updated more often, S2M or Blue Pebbles?

S2M ships an update every 4 days, and Blue Pebbles every 4 months. Most recently, S2M was updated on September 5, 2026 and Blue Pebbles on June 26, 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.*