Shipping iOS, now tackling Android… what’s the fastest path without rewriting everything?

Launched an iOS app recently (Swift + Capacitor mix), and now I’m working on getting Android to parity.

Trying to be smart about it - not looking to fully rewrite everything native if I don’t have to. Curious what people are actually using to speed this up:

•	vibecoding / AI builders (Lovable, FlutterFlow, etc.)

•	cross-platform layers (React Native, Flutter, Capacitor, etc.)

•	or just biting the bullet and going full native Kotlin

Main goals:

•	reuse as much logic/UI as possible

•	keep performance solid (not janky gym app vibes)

•	avoid creating a maintenance nightmare across two platforms

Would love to hear what’s worked in practice, especially if you started iOS-first.

App for context if helpful: https://apps.apple.com/us/app/goal-hour-workout-tracker/id6760379635