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Open FastTrack and tap the large "Start Fast" button on the Timer screen. You can choose from preset protocols like 16:8, 18:6, or 20:4, or select a custom duration. The timer will begin counting immediately.

Fed State (0-4h): Your body is digesting and absorbing nutrients.

Early Fasting (4-8h): Blood sugar begins to stabilize.

Fasting State (8-12h): Glycogen stores start depleting.

Fat Burning (12-18h): Your body enters ketosis and starts burning fat for energy.

Ketosis (18-24h): Deep ketone production for sustained energy.

Autophagy (24h+): Cellular cleanup and renewal processes become highly active.

Yes! You can pause your fast at any time by tapping the pause button on the timer screen. This is useful if you need to take a break. However, keep in mind that pausing your fast will affect your metabolic progress, as your body will exit the fasting state when you eat.

FastTrack uses iCloud to sync your data across all your Apple devices. Make sure you're signed into the same iCloud account on all devices and that iCloud is enabled for FastTrack in Settings > [Your Name] > iCloud. Data typically syncs within a few minutes.

Go to Settings in FastTrack and tap "Apple Health Integration". You'll be prompted to grant permissions. Once connected, your weight entries in FastTrack will sync with Apple Health, and weight data from other apps will appear in FastTrack.

FastTrack Premium includes:
- Unlimited fasting history
- Advanced analytics and insights
- Custom fasting protocols
- Premium widgets
- Export your data
- Priority support

The free version includes all basic tracking features with a 30-day history limit.

Subscriptions are managed through Apple. To cancel, go to Settings on your iPhone > [Your Name] > Subscriptions > FastTrack > Cancel Subscription. You'll continue to have access to premium features until the end of your current billing period.

Yes! Go to Settings in FastTrack and tap "Restore Purchases". Make sure you're signed into the same Apple ID you used for the original purchase. Your subscription and any lifetime purchases will be restored automatically.