How do I start and finish a fast?
Start tracking, review and save a finished fast, or discard an accidental start.
Fasty help
Help with Fasty
Find the task you want to do. Each guide explains the relevant controls and any Fasty Pro requirements.
These guides cover Fasty on iPhone and Apple Watch. Your date format and the names of some iOS settings may differ. Screenshots use demonstration records, not suggested fasting routines.
Tracking a fast
I forgot to start the timer. How do I correct it?
Set an ongoing fast to the time you actually started fasting.
How do I change my fasting goal?
Choose a duration or exact end time, and save frequently used goals as presets.
How do I change what the timer shows?
Choose elapsed or remaining time, seconds and days, and understand the eating timer.
What do the fasting zones mean?
Find the zone explanations and understand the difference between estimates and timer progress.
How do I set up workout-adjusted fasting zones?
Enable the adjustment, supply its Health inputs, and check what is missing if it does not work.
How do I connect Fasty to Apple Health?
Set up weight synchronization or the workout and resting-energy inputs used for adjusted zones.
How do I set reminders, and why didn't one arrive?
Configure daily reminders and progress alerts, and check missing or silent notifications.
History and statistics
How do I add a missing fast?
Enter a completed fast directly, with its original start and end dates.
How do I edit or delete a saved fast?
Correct a completed fast's dates or remove an incorrect record.
Where can I find my previous fasts?
Browse individual records, filter your history, or select a day in the calendar.
Why don't my statistics match the duration of a fast?
Understand individual fasts, daily portions and period totals before comparing numbers.
Why is my streak broken, and how is it calculated?
Check qualifying fasts, breaks and goal results, then inspect or change the streak rules.
How do I fix overlapping or duplicate fasts?
Inspect conflicting records and choose whether to correct, remove or merge them.
How do I delete my data and start fresh?
Clear completed fasts, remove weight records, or discard an ongoing fast.
How do I choose what appears in Statistics?
Show or hide cards and charts, restore a missing section, or reset the dashboard.
Weight
How do I log or correct my weight?
Enter dated measurements, choose kilograms or pounds, and remove an incorrect entry.
How do weight goals and trends work?
Set a goal, read progress, and understand why a trend or estimated date may be absent.
How do I connect Fasty to Apple Health?
Set up weight synchronization or the workout and resting-energy inputs used for adjusted zones.
Widgets and Live Activities
How do I add and use Fasty widgets?
Add Home Screen or Lock Screen widgets and check missing or outdated status.
How do I use Live Activities and the Dynamic Island?
Enable fasting/eating displays, choose button behavior, and understand disappearance or stale information.
Apple Watch
How do I use Fasty on Apple Watch?
Track a fast from your wrist, change goals, and add a complication or Smart Stack widget.
Why do my iPhone and Apple Watch show different information?
Distinguish active timer state, recent history and system refresh before troubleshooting.
Siri and Shortcuts
How do I use Fasty with Siri and Shortcuts?
Find Fasty actions, build a simple shortcut and understand which actions require Pro.
Can I start, finish or change goals automatically?
Use Shortcuts automations to run Fasty actions at your chosen times.
Import and export
How do I export my fasting or weight records?
Save a CSV copy and understand the dataset and overlap-merging options.
How do I import Fasty records?
Load a compatible fasting or weight CSV, review the preview and save the records.
How do I move Fasty to a new iPhone?
Transfer completed fasting and weight records with Fasty CSV export and import.
How do I bring my fasting history from Zero?
Use the supported Zero JSON importer and review the records before adding them.
Other
How do I change Fasty's appearance?
Choose themes, colors, zone icons or an app icon, and understand system light/dark appearance.
Why does Fasty keep showing a paywall?
Understand which actions open the Pro screen and how to keep tracking with the free controls.
How do I restore or manage Fasty Pro?
Find purchase management, check missing paid access, and manage an Apple subscription.
What is the roadmap, and what does voting mean?
Signal interest in ideas without confusing them with existing features or promised releases.