# Pluto.AI vs AI Grammar Fixer

The clearest difference is price: Pluto.AI at Free against AI Grammar Fixer's $1.99. Pluto.AI also leads on update cadence (fortnightly vs every 4 months) and iOS requirement (15.0 vs 18.6). On ads, in-app purchases and device support there is nothing between them.

Pluto.AI is free to download; AI Grammar Fixer costs $1.99 up front. Pluto.AI sells 1 in-app purchase, starting at $2.99 per month and AI Grammar Fixer sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Pluto.AI ships an update fortnightly, AI Grammar Fixer every 4 months. The most recent releases landed on November 4, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Pluto.AI | AI Grammar Fixer |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Size | 8 MB | 3 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Cem Ylmaz](https://appshunter.io/developer/1750696266) | [Aneesh Pradeep](https://appshunter.io/developer/1836157821) |

## What reviewers say

### Pluto.AI

[App page](https://appshunter.io/ios/app/plutoai/id6504052685)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Subscription | $2.99 | per month |


### AI Grammar Fixer

[App page](https://appshunter.io/ios/app/ai-grammar-fixer-gramfix/id6758783055)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gramfix AI Pro | $2.99 | per month |


## Frequently asked questions

### Is Pluto.AI free?

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

### Is AI Grammar Fixer free?

AI Grammar Fixer costs $1.99, and also offers in-app purchases.

### Do Pluto.AI or AI Grammar Fixer have ads?

Neither Pluto.AI nor AI Grammar Fixer shows ads.

### Which is updated more often, Pluto.AI or AI Grammar Fixer?

Pluto.AI ships an update fortnightly, and AI Grammar Fixer every 4 months. Most recently, Pluto.AI was updated on November 4, 2026 and AI Grammar Fixer on November 5, 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.*