I recently figured out that I could use ChatGPT Work on my Pixel Phone to build native Android apps. It builds the app and you can then directly download/install the APK. So now I just build small utility apps on-the-go whenever I need them :)
Amusingly, I started walking recently at a local track. One day while I was walking, I thought, "I should create a little web app for a counter to keep track of my laps." So I asked Claude Code and it whipped up a nice little mobile app with a big "+1" button, a reset, the whole deal, all within less than a lap and a half. Great! A lap later I think, "I should have it keep track of the time it takes me to walk each lap."
As I'm typing out the description, I realize, "You dumbass, you're describing the built-in chronograph feature of the Clock app!" So I just switched to that.