Burn's Insights tab showing a morning brief and stat tiles

Burn's struggle support sheet listing six tools

Burn's fast screen showing stage progress to 24h, the Morning Brief card, and energy, water, training and gut check-ins

HOME / FEATURES

Everything Burn does,
and nothing it doesn't.

A timer that names your stages, tools for the hours that are hard, and a record that turns into patterns you can act on. All of it built around one input: when you last ate.

No calorie database and no food diary, because fasting does not need either.

Download free on the App Store

The four that matter most

Start here.

If you only read about four things Burn does, make it these.

METABOLIC STAGES

Nine stages, named as you reach them

Fed State through Deep Autophagy. Each one tells you what is happening, what you may feel, and how firm the science behind it is.

How the stages work →

Burn's Fat Mobilisation stage detail for 14 to 18 hours, with what is happening and you may feel panels

IN-FAST SUPPORT

Six tools for the moment you want to quit

The 20-minute rule, drink water first, motivation boost, distract me, a symptom check, and a reminder of why you started.

See the support tools →

Burn's Struggle Support sheet at 15h 26m into a fast, listing its six tools

MORNING BRIEF

Your own numbers, read back to you

Eight sections, written each morning from your fasts, your check-ins, and whatever you have shared from Apple Health.

Read about Morning Brief →

BODY SCORE

One number, and the part that is dragging

A Burn score out of 100, built from weighted parts of your routine like fasting, hydration and consistency, each shown separately so you know what to fix.

How Body Score works →

Burn's Body Score at 44, broken down into fasting, hydration and consistency components

Your record

Where the fasts add up.

Every completed fast lands in one place, and after a couple of weeks it starts telling you things.

Journal

Days, weeks and months. Hours fasted, energy, mood, water, electrolytes, weight and measurements, all on one timeline.

Insights

Patterns written as sentences, with the arithmetic shown. Your strongest day, your averages, your records, your streaks.

Weekly and monthly reviews

Each week scored and summarized, each month reviewed, so progress is visible without you doing the sums.

Burn's Journal in Weeks view with the week of August 10 to 16 expanded, showing total, fasts, average, longest and rate

Built for Apple

Your fast is on every screen you own.

Native across iPhone, iPad and Apple Watch, with the fast visible without opening the app.

Apple Watch

Your fast on your wrist, with a buzz when you cross into a new stage.

Widgets and Live Activity

Elapsed time on your home and lock screens while the fast runs.

Apple Health

Sleep, steps and heart rate as context, entirely up to you.

Siri and Shortcuts

Five voice commands: start a fast, end it, check your duration, log water, check your Body Score.

Every feature

The full list.

Sixteen features, each with its own page.

Fasting timerThe ring, and what it counts Metabolic stagesAll nine, hour by hour In-fast supportSix tools, one tap away Body ScoreYour routine, out of 100 Morning BriefA daily read on your data InsightsPatterns in your history JournalDays, weeks and months Calendar syncFasts alongside your day Custom fasting plansYour own windows Extended fastingPast 24 hours, carefully StreaksConsistency, made visible ChallengesOpt in when you want a push Personal recordsYour bests, tracked Smart notificationsQuiet hours respected Weight trackingTrend, not daily noise Data exportYour history, as CSV

Try the whole thing tonight.

The stages, the support tools, the Journal, Morning Brief and the whole library are all in the app.