Everything you need to plan, track, and sustain intermittent fasting habits across iPhone, iPad, and Apple Watch.
Start or stop sessions quickly, monitor elapsed and remaining time, and continue beyond your target with overtime visibility.
Choose from 12:12 through 48-72h and OMAD, with beginner-to-expert framing plus custom interval creation.
Review sessions in grouped history and calendar views, add missed logs manually, and inspect trends across week/month/year.
Track daily hydration goals with quick actions and custom inputs, plus reminders during fasting windows when enabled.
Keep fasting progress visible from Home Screen, Lock Screen, and Dynamic Island with real-time status surfaces.
Stay motivated with milestones for streaks, consistency, duration, and hydration while learning practical fasting fundamentals.
Download Fast.IO on the App Store, then unlock Pro once for the complete toolset.
