# UDOO vs JustCha

The clearest difference is in-app purchases: UDOO at none against JustCha's 2. UDOO also leads on iOS requirement (12.4 vs 15.0). JustCha's advantage is update cadence (every 9 days vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. JustCha sells 2 in-app purchases, starting at $3.99 per month. UDOO asks for nothing beyond the download.

UDOO ships an update every 6 weeks, JustCha every 9 days. The most recent releases landed on October 5, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | UDOO | JustCha |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Size | 14 MB | 68 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Tinasoft Vietnam.,JSC](https://appshunter.io/developer/1488873541) | [QUYEN NGUYEN ANH](https://appshunter.io/developer/6779050527) |

## What reviewers say

### UDOO

[App page](https://appshunter.io/ios/app/udoo/id6468636276)

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

**In-app purchases:** none


### JustCha

[App page](https://appshunter.io/ios/app/justcha/id6779050525)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium hàng tháng | $3.99 | per month |
| Premium hàng năm | $29.99 | per year |


## Frequently asked questions

### Is UDOO free?

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

### Is JustCha free?

JustCha is free to download, with in-app purchases available.

### Do UDOO or JustCha have ads?

Neither UDOO nor JustCha shows ads.

### Which is updated more often, UDOO or JustCha?

UDOO ships an update every 6 weeks, and JustCha every 9 days. Most recently, UDOO was updated on October 5, 2026 and JustCha on September 27, 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.*