Comparison

ChatAI vs Caty App

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

Head to head
About

ChatAI

Features
Read full description

ChatAI lets you have intelligent conversations powered entirely by Local On-Device Intelligence โ€” running directly on your device. - Completely Private: Your conversations never leave your device. No servers, no tracking, no accounts required. - Chat History: All conversations are saved locally. Rename, organise, and revisit past chats anytime. - Fast & Offline: Works without an internet connection since everything runs on-device. - No Subscriptions: No hidden fees. Uses Local On-Device Intelligence built into your iPhone. Just open the app, start typing, and get helpful responses instantly.

About

Caty App

Features
Read full description

Caty App is a multi-model AI chat application that puts you in control. Connect to leading AI providers using your own API keys, or try Caty AI instantly with no setup required. MULTIPLE AI MODELS Chat with Claude (Anthropic), GPT (OpenAI), Grok (xAI), and any OpenAI-compatible provider. Switch between models anytime from the dropdown menu. Add unlimited custom providers. COUNCIL MODE Ask multiple AI models the same question and compare their perspectives. Tag models with @mentions and watch them respond one by one, each seeing what others said before them. TRY CATY AI No API keys? No problem. Purchase 100 messages for just โ‚ฌ0.99 and start chatting instantly. Powered by Anthropic's Claude technology. THREE UNIQUE THEMES Choose your style โ€” Caty (classic), Loli (minimal), or Neko (technical). Each theme has full light and dark mode support. PRIVACY FIRST Your data stays on your device. API keys are never sent to our servers. Chat history is stored locally with optional iCloud sync between your Apple devices. KEY FEATURES - Voice input and text-to-speech - File and image attachments with AI analysis - Web search integration - Deep thinking mode with visible reasoning - Markdown rendering with code highlighting - Cross-device sync via iCloud - Custom system prompts per chat - Chat history with pinning Free to use with your own API keys. All updates included.

Screenshots

ChatAI4 screens
Caty App4 screens

Verdict

The call

The clearest difference is in-app purchases: ChatAI at none against Caty App's 1. Caty App's advantage is update cadence (every 2 months vs every 5 months) and device support (4 vs 2). On price and ads there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Caty App sells 1 one-off in-app purchase. ChatAI asks for nothing beyond the download.

UpkeepUpdate frequency

ChatAI ships an update every 5 months, Caty App every 2 months. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

Scorecard4 real differences ยท 2 level
ChatAI versus Caty App: the parameters behind the verdict, then further details
ParameterChatAICaty App
PriceFreeFree
Update frequencyEvery 5 monthsEvery 2 months โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPadiPhone, iPad, iPod, Mac โ€” better
Requires iOS26.015.5 โ€” better
Further details โ€” not scored
Size2 MB71 MB
Age rating4+17+
DeveloperSaurabh SharmaOU Catyonic

In-app purchases

None

ChatAI

No in-app purchases

1 purchases

Caty App

One-time1
  • 100 AI Messages$0.99

Questions

Is ChatAI free?
ChatAI is free to download, with no in-app purchases.
Is Caty App free?
Caty App is free to download, with in-app purchases available.
Do ChatAI or Caty App have ads?
Neither ChatAI nor Caty App shows ads.
Which is updated more often, ChatAI or Caty App?
ChatAI ships an update every 5 months, and Caty App every 2 months. Most recently, ChatAI was updated on October 28, 2026 and Caty App on October 25, 2026.

Other comparisons