Download Sources
Device Configuration
Split APKs Installation Guide
Some apps are distributed as Split APKs (multiple .apk files packaged together) to optimize resources. Standard Android installers cannot open them.
Related Applications
What's New
🆕 v1.0.0 – Initial Release
🚀 Introducing ChatO1 – Smart AI Assistant & Creative Partner
• Chat with GPT-4o, Claude 3.7 & Claude 4 Sonnet
• Real-time web & news search
• Voice chat & realistic AI speech
• 15+ personas & custom AI personalities
• AI image generation & code execution
• 12 languages & beautiful chat design
About this app
ChatO1 – our Smart AI Assistant & Creative Companion
Meet ChatO1, the AI that truly gets you.
It’s more than a chatbot — it’s your creative partner, learning buddy, and personal assistant all in one. Whether you want deep conversations, quick answers, creative inspiration, or perform calculations, ChatO1 adapts to your mood and goals.
⚡ Why ChatO1?
Because it’s powered by the same advanced AI that drives the future — GPT-4o, Claude 3.7, and Claude 4 Sonnet. Smart, fast, and incredibly human.
🎭 Talk to AI, Your Way
Choose from 15+ unique personas made for every situation:
💼 AI Assistant, Doctor AI, Career Coach
🎓 Teacher, Science Explainer, Philosophy Guide
🎭 Playful Buddy, Storyteller, Comedian
💡 Life Coach, Relationship Coach, Fitness Trainer
🎨 Creative Muse, Poet, Overthinker
Pro users can create unlimited custom personas that match their exact vibe.
🔧 Do More Than Chat
ChatO1 gives you superpowers with built-in AI tools:
• Real-time web and news search
• AI image generation in seconds
• Code execution & file analysis (Pro)
• Smart document reader for PDFs, images, audio, and video
🎤 Speak Naturally
Talk instead of typing — and hear AI talk back.
• Speech recognition
• Realistic AI voices that sound natural
• Supports multiple languages
💬 Smart, Seamless Conversations
• Context-aware multi-turn chats
• Send images, files, and documents
• Syntax highlighting for code
• Beautiful math & LaTeX rendering
🎨 Make It Yours
• Custom themes & color palettes
• Light and dark modes
• Choose between different AI models
• Manage and revisit your chat history
✨ Free Plan Includes
• 50 messages per day
• +30 bonus messages by watching ads
• GPT-4o access (state-of-the-art model)
• 2 default personas
• News search & basic tools
• 1 file attachment per chat (up to 5 MB)
💎 Go Pro – Unlock Everything
Upgrade to ChatO1 Pro and get:
• Unlimited messages
• Premium AI models (Claude 3.7, Claude 4 Sonnet, GPT-4 & more)
• All 15+ personas + custom persona builder
• Unlimited AI audio responses
• Web search & code runner tools
• Ad-free experience
• Chat export (JSON/PDF)
• Attach up to 3 files at once (up to 10 MB each)
🌐 Available in 12 Languages
English (en), Arabic (ar), German (de), Spanish (es), French (fr), Italian (it), Japanese (ja), Korean (ko), Portuguese (pt), Russian (ru), Thai (th), and Chinese (zh).
🔒 Your Privacy, Protected
• Secure Google Sign-In
• Local chat storage — your data stays private
• No hidden cloud uploads
Whether you’re studying, creating, working, or just exploring, ChatO1 adapts to you — learning your rhythm, matching your energy, and helping you do more with AI.
Download ChatO1 today and experience conversations that actually feel alive.
📧 Support: Available in-app
🌐 Works online with real-time information
How to Download ChatO1 – Smart AI Chatbot APK
- Enter the package name
com.marcusxtechnologies.chato1on the APK Downloader homepage. - Select your device architecture (ARM64 recommended for modern devices).
- Click Download to get the merged APK file.
- Transfer and install the APK on your Android device.
- Keep Updated: Visit APK Downloader regularly to search for and download the latest secure versions of your favorite apps.
Security & Signature Verification
This APK download is 100% safe. We verify that the cryptographic signature of the file matches the official developer credentials. No modifications or adware are injected.