When it comes to mobile apps, I generally recommend native (swift/kotlin) or Flutter, they all have good tooling and have good performance

In this case though, they are all curly braces languages and don't have much in common with python.

If you don't want to learn at least 1 new language, there are some python libraries/frameworks which can be used for mobile dev. Like Kivy or Beeware. I've never used any of these though so I can't tell you how good/bad they are.