Timer
One screen, one action.
Start and stop a fast with a tap. Time elapsed and time remaining sit on a 24-hour dial. Forgot to tap? Correct the start or the end afterwards.
A calm timer for intermittent fasting.
Pick a plan, start your fast, and read your day on a 24-hour dial.
No account. No questionnaire. Your history stays yours.
Coming soon to the App Store
iPhone, iOS 17 or later
No account
Open the app and start. No sign-up, no questionnaire.
On your iPhone
Your fasts, notes and weight are stored on your device, not on a server.
History never locked
Every past fast stays visible, editable and exportable.
What Nistia does
Plans
Common schedules, or your own.
Six ready-made plans. Build a custom one, or give each day of the week its own plan.
| Plan | Fasting | Eating | For example |
|---|---|---|---|
| 12:12 | 12 h | 12 h | 8:00 to 20:00 |
| 14:10 | 14 h | 10 h | 9:00 to 19:00 |
| 16:8 | 16 h | 8 h | 12:00 to 20:00 |
| 18:6 | 18 h | 6 h | 13:00 to 19:00 |
| 20:4 | 20 h | 4 h | 15:00 to 19:00 |
| One meal a day | about 23 h | one meal | dinner at 19:00 |
Reminders
A quiet note at the right hour.
A notification when your fasting window starts, when it ends, and before your last meal. Each one can be adjusted or turned off.
History
A logbook you can correct.
A calendar and a list. Add a fast you forgot, edit one you mistimed, attach a note or a mood.
Statistics
Your weeks, months and years.
Current streak, average duration, total hours, and charts by week, month and year.
Widgets
The time, without opening the app.
Home Screen and Lock Screen widgets, a Live Activity and the Dynamic Island.
Weight and water
Two optional logs.
Quick entry, a curve, a goal. Weight can sync with Apple Health if you allow it.
Your data
Yours to take away.
Export and import CSV, back up to a file, restore on a new phone, or erase everything.
Your fasts stay on your iPhone.
- Nistia has no account and no server of its own. What you log is stored on your device.
- Apple Health is optional. Nistia reads and writes your weight only, and only if you allow it.
- No ads. No health data is sent to third parties.
A timer, not medical advice.
Nistia measures nothing and diagnoses nothing, and it makes no promise about results. Fasting is not suitable for everyone. Talk to a doctor before you start, especially if you are pregnant or breastfeeding, under 18, living with diabetes or another medical condition, or have a history of eating disorders.
Questions
Do I need an account?
No. Nistia has no sign-up and no questionnaire. You open the app, choose a plan and start your fast.
Is Nistia free?
Nistia is free to download. The timer, the 14:10, 16:8 and 18:6 plans, start and end reminders, your complete history, CSV export and your current streak are free with no time limit. Other features are optional purchases. The app shows what they are and what they cost before you buy.
Can my history ever be locked?
No. Every past fast stays visible, editable and exportable, whether or not you have bought anything. If a purchase ends, nothing is hidden or deleted.
Where is my data stored?
On your iPhone. Nistia does not sync your data to a server or to iCloud. To keep a copy or move to a new phone, back up to a file and restore it.
Which fasting plans are included?
12:12, 14:10, 16:8, 18:6, 20:4 and one meal a day, plus custom plans and a weekly schedule with a different plan for each day.
Does Nistia work with Apple Health?
Optionally. If you allow it, Nistia reads and writes your weight in Apple Health. It does not read anything else, and it works the same if you decline.
Is intermittent fasting right for me?
Nistia cannot answer that. It is a timer and a logbook, not a medical service. Talk to a doctor before you start, especially if you are pregnant or breastfeeding, under 18, living with diabetes or another medical condition, or have a history of eating disorders.
Which devices and languages are supported?
iPhone with iOS 17 or later. The app is available in English, French, Spanish and German.
Open it. Tap start.
Your first fast is under way in seconds.
Coming soon to the App Store
iPhone, iOS 17 or later