OneFeast
Master One Meal A Day the simple way.
OneFeast turns your fast into a clear, motivating timeline. Start a timer, watch your body move through each fasting stage, and build the streak — all in one gorgeous native iPhone app.
Free to start • No account • Your data stays on your devices
Built for one daily fast — done right
No clutter, no ads, no sign-up walls. Just the tools that keep you fasting consistently.
Live fasting timer
One tap to start. A clean, always-accurate timer shows exactly how long you've been fasting — and how long since your last meal.
Fasting-stage insights
Follow your body from digestion to deep ketosis with five science-based stages and what's happening in each one.
Smart meal tags
Tag your last meal and activity so the stage timeline shifts to match your real metabolism — not a generic clock.
Stage notifications
Get a heads-up the moment you reach Metabolic Switch or Ketogenesis Rising. Choose exactly which alerts you want — or none.
History & streaks
Every fast is logged with stats, milestones, and streaks that keep you coming back day after day.
Private iCloud sync
Your fasts sync across your devices through your own iCloud and survive a reinstall. No servers, no accounts, no tracking.
Know exactly where you are
OneFeast maps your fast to five stages so you always understand what your body is doing.
Fed & Anabolic 🍽️
Digesting and absorbing your meal. Blood sugar and insulin are elevated as your body stores energy.
Early Fasting 🌙
Insulin falls and your body finishes digesting, gradually shifting toward burning stored energy.
Metabolic Switch ⚡
Glycogen runs low and fat-burning ramps up. The classic "switch" that makes OMAD so effective.
Ketogenesis Rising 🔥
Ketone production climbs, fueling your brain and body and sharpening mental clarity.
Sustained Ketosis 💎
Deep fat-adaptation with elevated ketones and the cellular benefits of an extended fast.
Stage timings are general guidance and vary by person, activity, and what you last ate. OneFeast is for tracking and motivation, not medical advice.
Your data stays yours
OneFeast has no account, no analytics, and no servers. Your fasts live on your iPhone and sync only through your personal iCloud account.
Frequently asked
What is OMAD?
OMAD stands for "One Meal A Day" — an eating pattern where you eat all your daily food within a single window and fast the rest of the day. OneFeast is purpose-built to make that one daily fast easy to track and stay consistent with.
Do I need an account?
No. There's no sign-up and no login. Open the app and start your first fast immediately. Optional sync uses your own iCloud account automatically.
Will my data sync between my iPhone and iPad?
Your fasts sync across the devices signed into your iCloud account using iCloud's private key-value storage. (OneFeast is currently optimized for iPhone.) If you reinstall the app, your history comes back.
How much does OneFeast cost?
OneFeast is free to download, with no ads and no mandatory subscription. The core fasting tracker stays free — optional premium features may arrive later, and if the app helps you, you'll be able to support its development. We'll always be upfront about what's free and what's not.
Can I export my data?
Absolutely. OneFeast lets you export a full JSON backup from the History screen and import it back at any time, so you're always in control of your data.
Is this medical advice?
No. OneFeast is a tracking and motivation tool. Fasting isn't right for everyone — if you have a medical condition, are pregnant, or take medication, talk to a healthcare professional before changing your eating pattern.
Start your first fast today
OneFeast is rolling out through TestFlight ahead of its App Store launch.
Coming soon to the App Store for iPhone.