Your fasting routine, made simple.
A clear timer and daily windows. Start when you are ready; choose what works for your day.
Free on iPhone and Android
Choose a daily window, follow elapsed time and look back at your saved history. Start with the free timer. Check your installed app’s access labels and your store’s current subscription terms before purchasing.
Review the current price, billing period, renewal and cancellation terms before purchasing.
- Platform
- iPhone · Android
- Price
- Free
- Account
- Not required
- Privacy
- Read the policy
Real app · Sample data
Keep the details that help.
Log water or weight when useful. Your saved history gives you a place to look back.
Personalise your routineNo account.
No ads.
Read Fasta’s Privacy Policy for information about storage, optional services, exports and subscription processing.
How Fasta protects your privacyExplore Fasta
Explore your routine.
Personalise Today, take a mindful pause and explore your next week. Check the walkthrough and the access labels in your installed app.
View the app walkthroughMost people don't quit fasting because they lack discipline. They quit because the app kept asking for more on the day they had least to give.
Fasta is built the other way round. Some days it tells you to go gentle — and counts that as a good day too.
01The day
A fast, plotted.
Six stages, six colours — educational time estimates from the app’s timer model. Fasta does not measure your bodily state. Timing varies between people and meals; these labels are not a reason to extend a fast.
0h 00mAfter eating
| Model time | Stage | Educational description |
|---|---|---|
| 0h | After eatingUsing recent fuel | The model’s starting label after a meal. It does not measure digestion, insulin or fuel use. |
| 4h | Early fast estimateFuel use may shift | An educational label for the early fasting window, not a measurement of stored energy or fuel switching. |
| 12h | Stored-fuel estimateFuel mix may shift | A timer-based label; it does not establish how much fat you are using for fuel. |
| 18h | Possible ketone windowTiming varies | A timer-based label; elapsed time does not confirm your ketone level or energy response. |
| 24h | Longer-fast estimateCell timing varies | An educational label; this timer does not detect or confirm cellular recycling. |
| 48h | Extended fastExtra care | Beyond the one-day axis above. Extended fasting requires medical guidance; this model is not a recommendation to continue. |
DailyPresets and custom windows
6Fasting stages
0Accounts required
PolicyRead the privacy details
02How it works
Your routine, at a glance.
Choose a daily window
Review the presets and custom window options in the app.
Follow elapsed time
The timer shows elapsed time. Stage labels are educational estimates.
Look back at your history
Review the records you have saved.
03Inside
Every screen here is the real thing.
Real Fasta screens, captured with sample data. Layouts can vary by platform and version.
Follow elapsed time.
One ring, elapsed time and your next step. The stage name is an educational estimate based on your timer, not a measurement of what is happening in your body.
Choose a daily window.
Review the presets and custom window options. Check the current store listing for device requirements, and the access labels in your installed app for feature access.
Review the sample screen.
This real app capture shows sample data. Layouts and feature access can vary; review your installed app.
Explore the Coach screen.
This is a real app capture with sample data. Check your installed app’s access labels before choosing a feature.
Look back at your routine.
Basic history is free. Premium adds editable weekly schedules, reports and CSV export. Your store shows the current price, billing period and renewal terms before purchase.
04What you get
Start with the essentials.
The timer, daily presets, water and optional weight logging, basic history and basic weekly recap are free.
Premium adds editable weekly schedules, reports and CSV export. Your store shows the current price, billing period and renewal terms before purchase.
Check the current store listing for device requirements, and the access labels in your installed app for feature access.
05Your routine
Review what helps you.
Check the current store listing for device requirements, and the access labels in your installed app for feature access.
06Privacy
Read the privacy details.
Read Fasta’s Privacy Policy for information about storage, optional services, exports and subscription processing.
Privacy Policy
07Pricing
A useful free routine. More when you need it.
Fasta
Free
A useful place to start.
The timer, daily presets, water and optional weight logging, basic history and basic weekly recap are free.
Download FastaFasta Premium
OptionalSee the current offer
Price, period, any trial and renewal terms are shown in your app store before you buy, and vary by country.
Premium adds editable weekly schedules, reports and CSV export. Your store shows the current price, billing period and renewal terms before purchase.
Explore Fasta PremiumFasta is free to download. Premium is an auto-renewing subscription managed through your Apple or Google account and can be cancelled there at any time. For adults aged 18 and over. Apple’s 16+ store content rating is separate from Fasta’s adult-only eligibility. Fasta is not medical advice — if you are pregnant, managing a medical condition, taking medication affected by food timing, or have a history of disordered eating, speak with a qualified health professional before fasting.
08FAQ
Questions, answered.
What is free?
The timer, daily presets, water and optional weight logging, basic history and basic weekly recap are free.
What does Premium include?
Premium adds editable weekly schedules, reports and CSV export. Your store shows the current price, billing period and renewal terms before purchase.
Which devices and features are supported?
Check the current store listing for device requirements, and the access labels in your installed app for feature access.
Where can I read about privacy?
Read Fasta’s Privacy Policy for information about storage, optional services, exports and subscription processing. Read the Privacy Policy.
Is intermittent fasting safe for everyone?
No, and Fasta is not medical advice. If you are pregnant, under 18, managing a medical condition, taking medication affected by food timing, or have a history of disordered eating, speak with a qualified health professional before fasting. Read the terms for the full position.
Start where you actually are.
Start with the free timer. Review feature access in your installed app and the current terms shown by your store.
Choose your store. No account required.
Not faster. Fasta.
Check your store for device requirements · For adults 18+