# YO vs ATCD

The clearest difference is iOS requirement: ATCD at 12.0 against YO's 14.0. 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.

YO ships an update every 3 months, ATCD every 2 months. The most recent releases landed on June 22, 2026 and March 25, 2026 respectively.

## The numbers

| Metric | YO | ATCD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 409 MB | 35 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [勇 邹](https://appshunter.io/developer/1600180960) | [ZHUHAI REDBAY CO., LTD](https://appshunter.io/developer/1725503748) |

## What reviewers say

### YO

[App page](https://appshunter.io/ios/app/yo-smart/id1602450099)

**Features:** macOS Compatibility

**In-app purchases:** none


### ATCD

[App page](https://appshunter.io/ios/app/atcd/id6476090339)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is YO free?

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

### Is ATCD free?

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

### Do YO or ATCD have ads?

Neither YO nor ATCD shows ads.

### Which is updated more often, YO or ATCD?

YO ships an update every 3 months, and ATCD every 2 months. Most recently, YO was updated on June 22, 2026 and ATCD on March 25, 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.*