ChatXOS is the all-in-one AI chat app for iPhone. Instead of juggling separate subscriptions to ChatGPT ($20/mo), Claude ($20/mo), Gemini ($20/mo), and Grok ($30/mo), get access to all of them in one native iOS app for just $13/mo. The app includes 18+ AI models from OpenAI, Anthropic, Google, xAI, and DeepSeek. Use Claude 4.5 Opus for coding tasks, GPT-5.2 for general knowledge, Gemini 3.0 for research, Grok for real-time news, and DeepSeek for the cutting edge. Key features: - Switch models mid-conversation - Compare Mode: Run up to 4 models simultaneously and pick the best response - Chat organization with pinning and custom titles - Web search capabilities - Image/file attachments for vision models Built for mobile-first users who want the best AI for every task without subscription juggling.