Timer and eating window
Start and end a fast yourself. Saved times keep the timer accurate after a restart.
FASTING, ON YOUR TERMS
FastKeptYour fasting timer, plans and full history.
Keep your fasting timer, plans, and history together. You choose when a fast starts and ends.
Every feature, completely free.
FASTING, ON YOUR TERMS
Your routine, from start to finish.
Timers, schedules, and a full record of the fasts you choose to log.
Presets, custom lengths and schedules
Choose a preset, a custom length, or a recurring schedule.
Full history, no cutoff
Browse, edit, and export your history. Add a missed entry with overlap checks.
Consistency without pressure
Follow your schedule with room for breaks. Longer fasts never earn extra rewards.
Optional logs and reminders
Keep optional weight, water, mood, or measurement logs, with local reminders.
Export to CSV
Save a CSV copy of your records whenever you choose.
FastKept is a timer for tracking fasts, not medical advice. Fasting isn't right for everyone, so please check with your doctor first if you're pregnant, have diabetes or take medicines.
FastKept
Take a look inside.
A live timer with time to goal and when it ends
Your plan, the last 7 days and today's logs
12:12 to 23:1, Flexi, or your own custom length
Private by design
Your information.
Your choice.
Fasting records, plans and logs are stored on your iPhone, and every feature works without an account. If you choose the optional account and tap Back up, a copy is kept with your account so you can restore it. CSV export is always available. An account is optional. Health readings are never included in our online backups.
Part of Solstice Suite · Health & Fitness
Every feature, free.
Use the app without an account or a subscription.
Good to know
A few answers.
Can I download FastKept now?
Yes. FastKept is free on the App Store for iPhone. Download it here.
Will I need to pay for anything?
No. Every feature is free.
Do I need an account?
No. The timer, history, plans, reminders and export work without an account or internet connection.
Does the app tell me when to eat or how long to fast?
No. You choose your plans and when fasts start and end. FastKept gives no personalized medical or diet advice and does not assume a fast was completed just because a timer ended.
Is my history backed up?
Records are stored on your device. Backup, restore and sync are not part of the current plan, so use CSV export to keep your own copy. We will update this policy before launch to match the released app.
We're here to help.
A real person reads every message.