# UUUO vs GenSan

The clearest difference is update cadence: UUUO at every 10 days against GenSan's every 4 months. 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.

UUUO ships an update every 10 days, GenSan every 4 months. The most recent releases landed on September 23, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | UUUO | GenSan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 4 months |
| Size | 95 MB | 1 MB |
| Requires iOS | **15.0** | 15.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [UUUO, inc.](https://appshunter.io/developer/1489082725) | [Kenji Shimura](https://appshunter.io/developer/1588159987) |

## What reviewers say

### UUUO

[App page](https://appshunter.io/ios/app/uuuo/id1571920961)

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

**In-app purchases:** none


### GenSan

[App page](https://appshunter.io/ios/app/gensan/id6443973354)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is UUUO free?

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

### Is GenSan free?

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

### Do UUUO or GenSan have ads?

Neither UUUO nor GenSan shows ads.

### Which is updated more often, UUUO or GenSan?

UUUO ships an update every 10 days, and GenSan every 4 months. Most recently, UUUO was updated on September 23, 2026 and GenSan on September 15, 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.*