Yes, you can use ChatGPT on your phone. There is a ChatGPT app for iOS and Android devices, which is likely the most useful way to access it. However, the mobile web version will allow you to carry out the same actions as on a desktop browser. You can also access ChatGPT on your smartphone's web browser - just like you would on your desktop - and still make use of the GPT large language model and ChatGPT's natural language processing. If you're still looking for other large language models (LLM), and alternatives to the ChatGPT web app, try Google Bard, or Bing Chat on any desktop or mobile browser.