# WATA vs OOS

The clearest difference is device support: OOS at 3 against WATA's 1. OOS also leads on iOS requirement (12.4 vs 16.0). On price, update cadence, 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.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on September 6, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | WATA | OOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/wata/id1479665049/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | — |
| Size | 29 MB | 42 MB |
| Requires iOS | 16.0 | **12.4** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [IMG S.A.](https://appshunter.io/developer/1381539018) | [Lukasz Kmiecik](https://appshunter.io/developer/1676048515) |

## What reviewers say

### WATA

[App page](https://appshunter.io/ios/app/wata/id1479665049)

This app promotes ecological fitness by converting exercise energy into electricity. Track workouts, compete for points, and discover eco-friendly gyms. Earn rewards for your environmental efforts.

**Highlights:** Ecological cardio training, Kinetic energy conversion to electricity, Training assistant and progress monitoring, Competition and leaderboards, Discover eco-friendly gyms, Earn rewards for electricity generated

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

**In-app purchases:** none


### OOS

[App page](https://appshunter.io/ios/app/oos/id6446111586)

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

**In-app purchases:** none


## Frequently asked questions

### Is WATA free?

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

### Is OOS free?

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

### Do WATA or OOS have ads?

Neither WATA nor OOS shows ads.

### Which is updated more often, WATA or OOS?

WATA ships an update every 3 months, and OOS every 3 months. Most recently, WATA was updated on September 6, 2026 and OOS on September 7, 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.*