# Grammar Master by ChatStick vs Cognilo

The clearest difference is ads: Cognilo at none against Grammar Master by ChatStick's shown. Cognilo also leads on update cadence (fortnightly vs every 7 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Grammar Master by ChatStick sells 1 one-off in-app purchase and Cognilo sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Grammar Master by ChatStick ships an update every 7 months, Cognilo fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Grammar Master by ChatStick | Cognilo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Fortnightly** |
| Size | 10 MB | 7 MB |
| Requires iOS | 18.4 | **18.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ChatStick Company Limited](https://appshunter.io/developer/1165816085) | [James Gray](https://appshunter.io/developer/6787461080) |

## What reviewers say

### Grammar Master by ChatStick

[App page](https://appshunter.io/ios/app/grammar-master-by-chatstick/id6751647833)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Feature | $2.99 | one-time |


### Cognilo

[App page](https://appshunter.io/ios/app/cognilo-brain-training-games/id6808798253)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly · Brain Training | $9.99 | per month |
| Pro Annual · Brain Training | $44.99 | per year |


## Frequently asked questions

### Is Grammar Master by ChatStick free?

Grammar Master by ChatStick is free to download, with in-app purchases available.

### Is Cognilo free?

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

### Do Grammar Master by ChatStick or Cognilo have ads?

Grammar Master by ChatStick shows ads; Cognilo does not.

### Which is updated more often, Grammar Master by ChatStick or Cognilo?

Grammar Master by ChatStick ships an update every 7 months, and Cognilo fortnightly. Most recently, Grammar Master by ChatStick was updated on November 3, 2026 and Cognilo on October 31, 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.*