Support

StayFasted supports 16:8, 18:6, 20:4, OMAD (One Meal A Day), 24-hour, 36-hour, 48-hour, and 72-hour fasting protocols. You can also create custom fasting durations. The app is designed to support both intermittent fasting and extended multi-day fasts.

No. StayFasted works entirely offline. All features, including AI coaching (on supported devices), fasting timer, check-ins, and education content, work without an internet connection. The only feature that benefits from connectivity is weather-based activity suggestions.

Yes. All your data is stored exclusively on your device. There is no account, no cloud sync, and no server that stores your information. Your fasting history, check-in notes, AI conversations, and health data never leave your iPhone. See our Privacy Policy for full details.

On devices running iOS 26+ with Apple Intelligence, StayFasted uses Apple's on-device Foundation Models to generate personalized coaching responses. The AI considers your current mood, your fasting stage, your personal notes, and your "Why" profile to craft relevant, supportive responses. All processing happens on your iPhone's neural engine. On older devices, the app uses a curated response system that still personalizes based on your context.

StayFasted requires iOS 18.0 or later. For the full on-device AI coaching experience, iOS 26+ with Apple Intelligence is recommended (iPhone 15 Pro or later). The app works on all iPhones running iOS 18+, but AI features may use the curated response system on older devices.

Go to Settings within the app and tap "Reset All Data." This permanently deletes all fasting history, check-ins, photos, and preferences. Alternatively, uninstalling the app removes all data. Since nothing is stored externally, deletion is immediate and complete.

If you grant permission, StayFasted reads weight, steps, sleep, and resting heart rate from Apple Health to provide context during your fasts. This data is displayed within the app but is never transmitted externally. You can disconnect Apple Health at any time in Settings.

The refeed guide provides step-by-step guidance for safely breaking extended fasts (24+ hours). It recommends what to eat, when, and in what order to avoid refeeding syndrome and digestive discomfort. This is especially important for 48+ hour fasts where jumping straight to a large meal can be dangerous.

Email us at stayfasted.app@gmail.com with a description of what happened, what you expected to happen, and your iPhone model and iOS version. Screenshots are helpful. We take every bug report seriously and typically fix critical issues within 24-48 hours.

Absolutely. Email stayfasted.app@gmail.com with your idea. We actively build features based on user feedback. Many of our current features (the adherence grid, the refeed guide, the rhythm planner) came from user requests during beta testing.