# CorrectSMS.ai vs Grammar AI Checker

The clearest difference is update cadence: Grammar AI Checker at every 5 days against CorrectSMS.ai's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. CorrectSMS.ai sells 1 in-app purchase, starting at $3.99 per month and Grammar AI Checker sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

CorrectSMS.ai ships an update fortnightly, Grammar AI Checker every 5 days. The most recent releases landed on September 13, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | CorrectSMS.ai | Grammar AI Checker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Size | 32 MB | 16 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Comey](https://appshunter.io/developer/1705253260) | [Muhammad Zubair](https://appshunter.io/developer/1802731328) |

## What reviewers say

### CorrectSMS.ai

[App page](https://appshunter.io/ios/app/correctsmsai/id6463904749)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $3.99 | per month |


### Grammar AI Checker

[App page](https://appshunter.io/ios/app/grammar-ai-checker-correctify/id6745131479)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Grammar Checker Weekly | $4.99 | per 7 days |
| AI Grammar Checker Monthly | $6.99 | per month |
| AI Grammar Checker Yearly | $19.99 | per year |


## Frequently asked questions

### Is CorrectSMS.ai free?

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

### Is Grammar AI Checker free?

Grammar AI Checker is free to download, with in-app purchases available.

### Do CorrectSMS.ai or Grammar AI Checker have ads?

Neither CorrectSMS.ai nor Grammar AI Checker shows ads.

### Which is updated more often, CorrectSMS.ai or Grammar AI Checker?

CorrectSMS.ai ships an update fortnightly, and Grammar AI Checker every 5 days. Most recently, CorrectSMS.ai was updated on September 13, 2026 and Grammar AI Checker on September 21, 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.*