Caty App
Chat with Any AI Model
Free · In-App Purchases
Chat with multiple AI models in one app. Use Claude, GPT, Grok and more — or try Caty AI instantly for €0.99.
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 €0.99 and start chatting instantly. Powered by Anthropic's Claude technology.
THREE UNIQUE THEMES
Choose your style — 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.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Reasoning models improvements:
- Reasoning block now appears immediately when the model starts thinking
- Live counter in the header: Thinking... (12s) updates every second
- Accurate reasoning duration: Thought for N seconds reflects the actual thinking time
- Copy button added for reasoning content — top-right when collapsed, bottom-right when expanded
- Works for all reasoning models (DeepSeek, Qwen, and others)
General improvements:
- Unified copy button with consistent confirmation
- Better error diagnostics during response parsing
The developer, OU Catyonic, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- OU Catyonic
- Size
- 73.9 MB
- Category
- Productivity
- Compatibility
Requires iOS 15.5 or later.
- iPhone
Requires iOS 15.5 or later. - iPad
Requires iPadOS 15.5 or later. - iPod touch
Requires iOS 15.5 or later. - Mac
Requires macOS 11.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
16+
- 16+
- Infrequent
Profanity or Crude Humour
Contains
Unrestricted Web Access
- In-App Purchases
Yes
- 100 AI Messages ฿29.00
- Copyright
- © 2026 OÜ Catyonic