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The free app is a complete fasting app.

Unlimited fasting, all nine stages, Morning Brief, Body Score, Apple Watch, and the struggle tools are all in the free version. Nothing is time-limited and nothing important is held back.

Pro adds depth for people fasting longer or looking harder at their own data: more plans, more programs, and the analytics that need months of history to be worth anything.

Download free on the App Store

Free

Everything you need to run a fast and understand it

Burn Pro

Longer fasts, deeper analytics, more control

In the free app

Everything in the free app

This covers a complete fasting routine on its own.

Fasting and stages

  • Unlimited fasting, no session caps
  • Nine plans through 18:6, plus Flexi for open-ended fasts
  • Eight guided programs
  • All nine stages, with their detail sheets
  • The struggle support tools

Your record

  • Morning Brief
  • Body Score
  • Journal and weight tracking
  • Streaks and milestones
  • Twelve personal records, two challenges
  • CSV export

On your devices

  • Apple Watch app
  • Widgets and Live Activities
  • Siri commands
  • Apple Health, opt-in per channel
  • Core notifications
  • The full education library

Nine plans and eight guided programs

Everything from 12:12 up to 18:6, plus Flexi for fasts with no set finish. Eight guided programs are included, so you can follow a structured week from the start.

See all the schedules →
Burn's plan selection screen listing fasting schedules to choose from Burn's All Programs list, grouped by goal: Just Exploring, Lose Weight, and Sharpen Focus, each program showing its length and difficulty

What Pro adds

For longer fasts and closer reading

Everything in the free app, plus the following.

+11

More plans, including the long ones

Eleven additional plans, including OMAD and the 24 to 96 hour fasts.

+13

More guided programs

Thirteen additional programs on top of the eight in the free app, for 21 in total.

Pro Analytics

Stage frequency, gut correlation, and unlimited pattern detection instead of a capped set.

Reports and history

PDF monthly reports, full weekly summary history, and fasting-session export to Apple Health.

Smart notifications

Four smart notification types, rate-limited and aware of your quiet hours.

Streak freezes and challenges

Two streak freezes a month, so one missed day does not undo a run, plus four additional challenges.

Pro Analytics reads months, not days

Which stages you actually reach and how often. When you tend to start. A consistency score out of 100, your deepest stage, and the start time your own record says works best.

These need a real history behind them, which is why they sit in Pro.

Burn's Pro Analytics card showing a consistency score of 92 out of 100, deepest stage Fat Burning, and an optimal start of 7:59PM, above a When you fast chart Burn's Stage frequency panel across 54 fasts, showing Fat Release reached in 43 of them and Ketosis in 4

Side by side

The whole comparison

Free Burn Pro
Fasting sessions Unlimited Unlimited
Fasting plans Nine, through 18:6, plus Flexi Twenty, including OMAD and 24 to 96 hours
Guided programs Eight Twenty-one
Fasting stages All nine All nine
Morning Brief and Body Score Included Included
Pattern detection Standard set Unlimited, plus gut correlation
Personal records Twelve Twelve
Challenges Two Six
Streak freezes Not included Two a month
Smart notifications Core notifications Four smart types
Weekly summary history Limited Full history
Export CSV CSV, PDF monthly reports, Apple Health sessions
Apple Watch, widgets, Live Activities, Siri Included Included
Education library and struggle tools Included Included

Whichever tier you are on

Programs and challenges are suggested from your own record

Once Burn can see how you actually fast, it suggests programs that match it, with the length and average hours shown before you commit. Challenges sit alongside them, each with a plain rule: complete every planned fast for seven days, or accumulate a hundred hours in a month.

Burn's Recommended for you panel suggesting the 21-Day Deep Focus, 28-Day Advanced Health Protocol, and 28-Day Flow State programs, each with its length and average fasting hours Burn's challenge cards including 7-Day Streak, Three 20s, 14-Day Consistency, The Century, and Iron Week, each with a Start button

Which one

Start with the free app. Move to Pro if you hit a limit.

Free is right for you if

  • You fast on a daily schedule up to 18:6
  • You want the stages, Morning Brief, and the support tools
  • You are building the habit rather than optimizing it
  • CSV is enough for your own record keeping

Pro is worth it if

  • You run OMAD or fasts beyond 24 hours
  • You want a program written for a specific goal
  • You have months of history and want it analyzed properly
  • You want monthly PDF reports or Apple Health session export

Start with the free app

Nine stages, unlimited fasts, and every support tool. Decide about Pro once you know how you fast.

Download free on the App Store

iPhone, iPad, and Apple Watch. Requires iOS 18 or watchOS 11.