State Machines: From Boolean Chaos to Robust Health App Architecture

Health app state management extends beyond simple playing/paused flags—accounting for interruptions, background transitions, and user actions creates impossible state combinations with traditional booleans. This case study demonstrates how explicit state machines eliminate unreachable states and enable centralized side effect handling. The pattern of validating transitions and concentrating side effects in a single handler provides a reusable blueprint for developers building resilient health applications.