Comparison

CATS Input Method Pro vs ProseKey AI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CATS Input Method Pro

Features
Read full description

Writing Chinese is a breeze if you use the Chinese Alphabet Teaching System. You can also input the same way as you write Chinese. It is the fastest way of inputting Chinese, and even better, by using it, you also learn how to write Chinese characters better. It is the ideal way of implementing the EasyChinese method of learning Chinese. CATS Input Method Pro is a system-wide iOS keyboard: enable it once in Settings → General → Keyboard → Keyboards, then write Chinese by strokes in any app. Version 2.0 is an all-new keyboard, rebuilt with a native iOS look in light and dark mode, with both the learning and standard key layouts, word association, and the professional vocabulary. Your settings carry over from earlier versions.

About

ProseKey AI

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
Read full description

Transform your mobile writing experience with ProseKey AI! This powerful iOS keyboard integrates cutting-edge AI directly into your typing workflow, helping you communicate more effectively, wherever you write. Unlock AI Superpowers for Your Text: - Instant Proofreading: Catch grammar mistakes and typos before you hit send. - Effortless Rewriting: Rephrase sentences for clarity, adjust the tone, or change the length with a tap. - Quick Summarization: Condense long articles or messages into key points instantly. - Text-to-Table Conversion: Magically organize information by converting selected text into a structured table. - Custom Instructions: Define your own unique AI prompts and access them directly from the keyboard for personalized assistance. Flexible AI Integration: ProseKey AI seamlessly integrates as a third-party keyboard on your iPhone. Choose your preferred AI engine by connecting your own API keys from leading providers like Gemini, Mistral, and various OpenAI-compatible APIs. This gives you full control over the AI models powering your writing assistance. Get Started: Simply install the keyboard, give it the required permissions, add your API key(s) in the companion app, and start enhancing your writing across all your favorite apps – Mail, Messages, Notes, social media, and more! Please note that an API key is essential for the AI capabilities to function. The app provides instructions on how to acquire this.

Screenshots

CATS Input Method Pro4 screens
ProseKey AI4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard1 real difference · 8 level
CATS Input Method Pro versus ProseKey AI: the parameters behind the verdict, then further details
ParameterCATS Input Method ProProseKey AI
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 24 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.016.0 — better
Further details — not scored
Size7 MB29 MB
Age rating4+4+
DeveloperYIU LEUNG RANDY CHANArya Mirsepasi

In-app purchases

None

CATS Input Method Pro

No in-app purchases

None

ProseKey AI

No in-app purchases

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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