Small anecdote, but back in early 2024 (like, March), I did a ton of searching for an AI helper app that would allow me to use the gemini API key from AI studio. Chatbox was one of only two that I found (can't remember the other), but even back then I was astounded by its functionality and ease of use. It supported a ton of stuff, like custom system prompts, etc. Basically recreated a lot of the lmstudio experience but on a phone.

You'd be surprised, but it was extremely difficult to find an android app that supported API key usage. Ahead of its time.

I use Pal for iOS, it has a lot of nice features and it’s a native app.