The first is the AI Chat PowerBrain Assistant & AI Chatbot. This AI assistant uses ChatGPT and GPT-4 for quick answers, automating tasks and other natural language processing abilities. It supports multiple languages, has an AI writer, chat history, and syncs across devices. It's available on iOS, Android, web and desktop and has a free tier so you can try it out.
Another option is Monica. Monica uses GPT-4 and Claude 3 to offer a variety of AI tools, including chat, summarization, writing, search, translation and even art. You can use it in Chrome, Edge or as a standalone app, and it works across multiple devices. Monica is geared for professionals, with market intelligence, strategy advice, reading help and other tools.