Microsoft launches Copilot AI assistant app for iPhone after Android debut
- Microsoft Copilot app now available for iOS devices after recent Android launch
- Copilot is a AI chatbot that helps with search, writing, and summarizing
- It is powered by GPT-4, the latest AI model from OpenAI
- Formerly known as Bing Chat, now rebranded as Microsoft Copilot with a separate website
- Offers capabilities beyond ChatGPT while being free to use unlike ChatGPT