Fed State
The starting point after your last meal.
Intermittent fasting, at your pace
Fasting,
finally simple.
One tap to start.
Your time, your rhythm and your progress.
And just what you need to stay on track.
On iPhone and Android. Free to download.
Less noise. More clarity.
Simple, down to the details.
No accountEven offlineNo ads, no tracking
Made for everyday life
Small steps.
A habit that grows.
Everything that matters, in one place.
Without complicating the rest.
Real app screens, shown in English.
The timer
Your next fast starts here.
Progress
A calendar to find your rhythm.
Achievements
Small wins worth celebrating.
Guides
A little clarity at every step.
One day. Your balance.
Your window.
Your rules.
Your days are like no one else’s.
Your fasting rhythm isn’t either.
Pick a protocol, or create your own fasting and eating window. Fastn adapts to you.
Pick a rhythm to see your day.
24 hours, your wayPreview
00061218
16:8Your rhythm, simply.
16 h of fasting8 h to eat
Fast ends
An example daily window, to adapt to your needs.
A little more clarity
Every phase,
explained.
Short explanations to discover the main phases of fasting. To read and understand, at your pace.
Fat Burning
A marker to discover this phase of fasting.
Ketosis
Simple words to understand ketones.
Autophagy
A guide to explore this cellular process.
Deep Ketosis
A look at the phases of extended fasting.
Educational markers, not a measure of your metabolism.
Private by nature
Your data.
Only yours.
An app to take time for yourself.
Not to take your data.
No account to create.
No sign-up, no email. You open the app, you start.
The freedom of offline.
Your timer and your history stay within reach.
No ads. No tracking.
Your attention stays on what matters to you.
Your backups, at home.
In your own iCloud Drive or Google Drive, whenever you want.
And the details that change everything
A little attention.
At every moment.
Useful, discreet tools.
Always there when you need them.
One glance is enough.
Home-screen widgets, plus a Live Activity on the iPhone Lock Screen. Your timer, without even opening the app.
Live Activity · iPhoneEvery glass counts.
Log your water in a tap, throughout your day.
Your progress, your own.
Log your weight and keep a personal marker in one place.
The right moment.
Reminders to keep your eating window in mind.
The simplest thing is to start.
Find your rhythm.
Stay on track.
One first step. Then the rest, your way.
On iPhone and Android. Free to download.
Fastn Premium unlocks every feature. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel your subscription in your App Store or Google Play account settings.
Is Fastn free?
Fastn is free to download. Using it requires Fastn Premium, which includes every feature: a monthly subscription with a 7-day free trial for new subscribers, or a one-time lifetime purchase. The App Store and Google Play show the price in your currency before you pay.
Do I need an account?
No. There is no sign-up, no email and no password. Fastn opens straight into a short setup, then to your timer.
Which fasting protocols does Fastn support?
12:12, 14:10, 16:8, 18:6, 20:4, OMAD (one meal a day) and a 36-hour extended fast, plus custom protocols with your own fasting and eating hours.
Is my data private?
Your fasts, weight and water are stored on your phone, not on a server. Fastn has no ads, no analytics and no tracking. Backups are files you save to your own iCloud Drive or Google Drive.
Is intermittent fasting safe for everyone?
No. Fastn is for adults 18 and over and gives general information, not medical advice. Talk to your doctor before you start, especially if you are pregnant or breastfeeding, have diabetes, take medication or have a history of eating disorders.