# Immibook. vs UM3

The clearest difference is update cadence: UM3 at every 10 days against Immibook.'s every 3 months. Immibook.'s advantage is iOS requirement (13.0 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.

Immibook. ships an update every 3 months, UM3 every 10 days. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Immibook. | UM3 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 10 days** |
| Size | 64 MB | 49 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Akshit Monga](https://appshunter.io/developer/1716501928) | [Kong Thought Limited](https://appshunter.io/developer/1872389265) |

## What reviewers say

### Immibook.

[App page](https://appshunter.io/ios/app/immibook/id6472034416)

**In-app purchases:** none


### UM3

[App page](https://appshunter.io/ios/app/um3-chat-and-learn-languages/id6758341833)

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

**In-app purchases:** none


## Frequently asked questions

### Is Immibook. free?

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

### Is UM3 free?

UM3 is free to download, with no in-app purchases.

### Do Immibook. or UM3 have ads?

Neither Immibook. nor UM3 shows ads.

### Which is updated more often, Immibook. or UM3?

Immibook. ships an update every 3 months, and UM3 every 10 days. Most recently, Immibook. was updated on October 14, 2026 and UM3 on October 9, 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.*