NN666Interval

Keep every timed moment clear and dependable with a focused offline timer collection.

Stopwatch
Track elapsed time with start, pause, resume, reset, and lap recording. Every lap shows its split and cumulative time so progress is easy to understand.

Countdown
Set a named countdown from one second to 99 hours. Pause, resume, add one minute, restart a completed timer, and receive a clear completion message with optional sound and vibration.

Interval plans
Build a plan with two to twelve named stages and repeat it for one to fifty loops. The running view shows the current stage, progress, next transition, and loop count. You can pause or skip to the next stage when plans change.

Local history and presets
Save completed sessions to a local history list, remove individual records, or clear the list. Save interval plans as presets and archive plans you no longer need.

Designed for real use
Timer values are derived from real clock timestamps, so pausing, backgrounding, locking the screen, or reopening the app does not create fake animated time. Active state is restored locally. The app works without an account, advertising, cloud sync, or a network connection.