The fasting timer built for
OMAD and extended fasts.

No calorie counting. No meal plans. Just your fast, your streaks, and your results. Track body phases from fat burning to autophagy.

Built different.

Most fasting apps are bloated with features you don't need. DeepFast is laser-focused on what matters.

Beautiful animated timer ring with real-time body phase tracking. Supports OMAD, Warrior, 36h, 48h, 72h, and custom fasts up to 7 days.

See exactly where you are: fat burning, ketosis, deep ketosis, autophagy, and beyond. Science-backed phase descriptions at every stage.

Build your streak, day by day. Monthly calendar view with completion tracking, current streak counter, and detailed fast history.

Log your weight manually or sync from Apple Health. Trend chart with moving average shows your real progress, not daily noise.

Reads and writes weight data to Apple Health. Your smart scale data flows right in. Everything stays in sync.

Get notified when you enter each body phase. Milestone alerts, completion celebrations, and optional streak reminders.

We intentionally left out everything that doesn't help you fast.

Calorie tracking

Meal plans

Social features

AI chatbot

Photo logging

Barcode scanning

Workout tracking

Step counting

Download DeepFast and take control of your fasting practice. Available on iPhone.