Toolbox is an all-in-one Android application that brings everyday utilities and home-screen widgets into one package. Its engineering challenge is keeping many small features coherent while the product continues to evolve.
Why incremental migration is safer
Migrating substantial UI from XML to Jetpack Compose does not need to become a rewrite. Choose one utility surface, define its state and events, and let old and new screens coexist while behavior is compared.
This keeps each change reviewable and makes regressions easier to isolate.
Keep feature state local
Each utility should own the state it needs. Shared settings and navigation should remain at a higher boundary.
Clear state ownership keeps recomposition understandable and prevents an update in one tool from invalidating unrelated screens.
Measure release risk
After every migration step, track:
- Crashes and startup behavior
- Accessibility of the most-used flows
- Scrolling and interaction performance
- Widget behavior and configuration
- Release-specific regressions
Compose is valuable when it improves iteration without making release signals harder to read.
The practical lesson is to modernize one boundary at a time, keep the product usable throughout the migration, and let measured behavior decide the next step.
Source: Jetpack Compose performance
