# O vs Souj

The clearest difference is update cadence: Souj at every 8 days against O's every 3 weeks. O's advantage is iOS requirement (9.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

O ships an update every 3 weeks, Souj every 8 days. The most recent releases landed on October 19, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | O | Souj |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free | — |
| Size | 5 MB | 91 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Shenzhen LINGXI Technology Co., Ltd](https://appshunter.io/developer/957619029) | [Moonote Co., Ltd.](https://appshunter.io/developer/1895727282) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-1/id1592076425)

This app helps you manage your weight and physical data. It collects information from body fat scales and your smartphone to calculate and store various health metrics.

**Highlights:** Body data collection, Health data analysis, Health data storage, Calculates health indices, Integrates with body fat scales

**Features:** macOS Compatibility

**In-app purchases:** none


### Souj

[App page](https://appshunter.io/ios/app/souj/id6764310901)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is Souj free?

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

### Do O or Souj have ads?

Neither O nor Souj shows ads.

### Which is updated more often, O or Souj?

O ships an update every 3 weeks, and Souj every 8 days. Most recently, O was updated on October 19, 2026 and Souj on October 10, 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.*