I think some comment bots are nice, like the TLDR / summarization bot, reminder bot, youtube piped links, maybe one that replaces an amp link with the original? But these bots should be labeled as bots in settings so users have the option to toggle off seeing them.
I don’t like having bots post posts though, I’ve seen some in other instances and there’s not much discussion happening in the comments a lot of the time.
I’ve been using flutter + android studio and I’m enjoying it (as much as you can while making a mobile app). Android studio is a lot but it includes android emulators which is nice to test stuff on if you don’t feel like getting your phone.
You’ll need to install flutter (works on windows, mac, and linux), android studio (I think vscode also works?), and you can download a sample project, open it, build it, and run it. It’s a great way to see how it works. Then you can create your own project and go from there. Flutter has a lot of packages which I would recommend at looking through (if your app is simple you might not need any of these though).
Once you build and run the app on your android phone, it’s there and you can use it. You don’t need to upload it to google play or anything else (unless you want to share it).