# CHEMOU vs AllTCAS

The clearest difference is ads: CHEMOU at none against AllTCAS's shown. CHEMOU also leads on iOS requirement (13.0 vs 16.4). AllTCAS's advantage is update cadence (fortnightly vs every 3 months). On price, 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.

CHEMOU ships an update every 3 months, AllTCAS fortnightly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | CHEMOU | AllTCAS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 40 MB | 176 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Chalit Chathirat](https://appshunter.io/developer/910858647) | [ALL LEARN CORPORATION LIMITED](https://appshunter.io/developer/1834639044) |

## What reviewers say

### CHEMOU

[App page](https://appshunter.io/ios/app/chemou/id1094568253)

**Features:** macOS Compatibility

**In-app purchases:** none


### AllTCAS

[App page](https://appshunter.io/ios/app/alltcas/id6789263820)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CHEMOU free?

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

### Is AllTCAS free?

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

### Do CHEMOU or AllTCAS have ads?

AllTCAS shows ads; CHEMOU does not.

### Which is updated more often, CHEMOU or AllTCAS?

CHEMOU ships an update every 3 months, and AllTCAS fortnightly. Most recently, CHEMOU was updated on October 26, 2026 and AllTCAS on October 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.*