Jetpack Compose state management guide explains remember, rememberSaveable, ViewModel

A common source of bugs in Jetpack Compose apps involves state not persisting correctly across UI updates or app lifecycle events. The framework requires state to be stored in observable holders and retained with mechanisms like 'remember' to survive recomposition. The 'rememberSaveable' function preserves state across configuration changes, such as screen rotation, by saving it to a Bundle. A ViewModel can retain state across configuration changes but not necessarily process death, while solutions like Room or DataStore offer the most persistence.