# CATS Input Method Pro vs ProseKey AI

The clearest difference is update cadence: ProseKey AI at fortnightly against CATS Input Method Pro's every 24 months. 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.

CATS Input Method Pro ships an update every 24 months, ProseKey AI fortnightly. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | CATS Input Method Pro | ProseKey AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/prosekey-ai/id6741180175/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Fortnightly** |
| Monetization | — | Free |
| Size | 7 MB | 29 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YIU LEUNG RANDY CHAN](https://appshunter.io/developer/1474191447) | [Arya Mirsepasi](https://appshunter.io/developer/1791440463) |

## What reviewers say

### CATS Input Method Pro

[App page](https://appshunter.io/ios/app/cats-input-method-pro/id1523143711)

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

**In-app purchases:** none


### ProseKey AI

[App page](https://appshunter.io/ios/app/prosekey-ai/id6741180175)

Enhance your mobile writing with an AI-powered keyboard. It offers instant proofreading, effortless rewriting, quick summarization, and text-to-table conversion. Connect your own API keys for personalized AI assistance across all your apps.

**Highlights:** Instant proofreading, Effortless rewriting, Quick summarization, Text-to-table conversion, Custom AI instructions, Third-party keyboard integration

**In-app purchases:** none


## Frequently asked questions

### Is CATS Input Method Pro free?

CATS Input Method Pro is free to download, with no in-app purchases.

### Is ProseKey AI free?

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

### Do CATS Input Method Pro or ProseKey AI have ads?

Neither CATS Input Method Pro nor ProseKey AI shows ads.

### Which is updated more often, CATS Input Method Pro or ProseKey AI?

CATS Input Method Pro ships an update every 24 months, and ProseKey AI fortnightly. Most recently, CATS Input Method Pro was updated on October 29, 2026 and ProseKey AI on October 30, 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.*