Start a fast, adjust the goal, edit history, and keep your routine flexible when real life interrupts the plan.
iPhone. iPad. Apple Watch.
Fasting, without the theater.
A clean intermittent fasting timer with reliable widgets, flexible schedules, Apple Watch support, local-first data, and a business model that does not revolve around annoying you.
Download on the App Store
Android — Coming soon
Home Screen widgets, Lock Screen widgets, Live Activities, and Apple Watch support keep the timer visible without opening the app.
Recurring fasts, reminders, fasting phase education, and optional sync are there when they help, not when they get in the way.
What is TrueFast?
TrueFast is a fasting timer for iPhone, iPad, and Apple Watch. It is built for people who want a straightforward way to start, stop, edit, and review fasts without social feeds, ads, or a maze of upgrade prompts.
What is included for free?
The free core includes the fasting timer, full history, streaks, badges, one active schedule, fasting phase education, Home Screen widgets, Lock Screen widgets, Live Activities, and Apple Watch support.
Does TrueFast work on Apple Watch?
Yes. TrueFast includes Apple Watch support so you can check progress from your wrist. The iPhone and iPad app also support widgets and Live Activities for quick progress checks throughout the day.
How does TrueFast handle data?
TrueFast is local-first by default. Your fasting history, schedule, and settings stay on your device unless you choose features that need optional sync. The app is not built around advertising or selling user data.
Free Core
The timer is free. Forever.
Start, stop, edit. Full history with streaks and badges. Widgets, Live Activity, and Apple Watch. One active schedule. Fasting phase education. No ads. No trial. No nag. The free version is meant to be useful on its own, not a demo that expires after you build a routine.
Want more? TrueFast Pro adds iCloud sync, weight tracking, advanced charts, CSV export, custom themes, and more for power users who want deeper records across devices.
TrueFast Pro
For when you want more.
Adds iCloud sync across devices, unlimited schedules, weight tracking with Apple Health, advanced 90- and 180-day charts, CSV export, custom themes, custom app icons, and future Pro features.
Available monthly, yearly, or as a one-time lifetime purchase. The App Store sets pricing for your region, handles purchases, and manages refunds.
Trust
Built with a narrower promise.
TrueFast is published by Evan Mattson and is designed as a practical fasting tracker, not a medical service. It does not provide medical advice, diagnosis, or treatment. Fasting may not be appropriate for children, teens, pregnant or breastfeeding people, people with a history of eating disorders, or people with certain medical conditions.
- Use TrueFast as a timer and record keeper, not as a substitute for professional medical guidance.
- Review the privacy policy for local storage, optional sync, Apple Health permissions, diagnostics, purchases, and website analytics.
- Contact support for help with setup, widgets, Apple Watch behavior, refunds, data questions, or reliability issues.
- Download only from the official TrueFast App Store page.
Flexible fasting schedules
Create a saved fasting goal, start it quickly, and edit when needed. TrueFast is built around the reality that fasting routines change because of travel, workouts, sleep, meals, or health needs.
Progress without clutter
Review completed fasts, streaks, badges, and charts without turning fasting into a social competition. Pro users can export CSV files for their own records.