Support

How do I start a fast?

Open the app and tap the "Start fast" button on the "My day" tab. You can choose from various fasting plans like 16:8, 18:6, or 20:4. The timer will begin tracking your fasting period automatically.

Can I change my fasting plan?

Yes. On the "My day" tab, tap "Manage fast", then "Select Plan". If a fast is already running, tap "Manage fast", then "Switch active plan" to review the available switch options.

How do I cancel my subscription?

To cancel your subscription:

iOS: Settings > Your Name > Subscriptions > Only Fasting > Cancel

Android: Google Play Store > Menu > Subscriptions > Only Fasting > Cancel

How do I restore my purchases?

Go to Profile > Account & Subscription > Restore Purchases. This will sync your subscription status if you've reinstalled the app or changed devices.

Is my data synced across devices?

Yes! When you create an account and sign in, your data is automatically synced across all your devices. If you use the app without creating an account, the app creates an anonymous guest account tied to your device and syncs your data under that account to our servers in the EU (Frankfurt). It is not associated with your identity; if you later create an account, the same data is linked to it.

How does AI nutrition analysis work?

Take a photo of your meal or describe it in text, and our AI will estimate calories and macronutrients (protein, carbs, fat). Separately, when you submit an activity description for AI activity analysis, your body weight (kg) is sent to calculate calories. Our AI processors are Google LLC (Gemini API) and Anthropic, PBC (Claude API). Processing takes place in the USA. Meal text and meal photo analysis use Anthropic or Google, with Google as the fallback. Menu scanning, activity calorie estimates, weekly insights and barcode web search use Google. Momo Coach recipients are Anthropic, PBC (Claude API) and Google LLC (Gemini API). For users who accepted the current in-app consent text, Momo Coach's primary provider is, where available, Anthropic, PBC (Claude API), with Google LLC (Gemini API) as the fallback. When the fallback is used, the same message may also be sent to Google LLC (Gemini API). Momo Coach messages from users who accepted an earlier in-app consent text are processed by Google LLC (Gemini API) until they accept the current text. No account identifiers are added to these requests. No personal identifiers such as your email, name, or user ID are sent.

How do I delete my account?

If you are signed in, go to Profile > Privacy & Data > Delete Account Permanently to delete the account and its associated data in the app. "Delete All Data" clears local app data only. You can also submit a request through our account deletion page.

How does Apple Health / Health Connect sync work?

Health sync is optional. With the permissions you choose, the app can read supported steps, active energy, workouts, weight, height, sleep, and resting heart-rate data. Saved meal energy and macros, water, and manual weight are written to Apple Health or Health Connect only while the separate account-level “Write to Apple Health” (iOS) or “Write to Health Connect” (Android) control is on and the requested system write permissions are granted. Availability varies by platform and permission. You can turn either control off in the app and revoke system access at any time in iOS Settings > Privacy & Security > Health or in Health Connect on Android. We do not use this data for advertising or sell it.

Is fasting safe?

Intermittent fasting may be suitable for many healthy adults, but individual responses can vary significantly. We strongly recommend consulting with a qualified healthcare professional before starting any fasting regimen, especially if you have underlying health conditions, are pregnant, breastfeeding, or taking medications. This app does not provide medical advice.