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Your fasting history, as a file you keep

Export your history as CSV at any time. It opens in Excel, Numbers, Google Sheets or anything else that reads a spreadsheet, and it is yours to do whatever you like with.

Stored on your device Not locked to one app Journal entries included

What the file holds

CSV

Every fast, with its start and end FASTS

The length it ran to, and the stage reached DURATION

Weight entries, with their dates WEIGHT

Water, electrolytes and anything else you logged JOURNAL

Ketone and glucose readings you entered yourself BLOOD LEVELS

Why it is there

Three reasons to take the file

Take it to your doctor

A spreadsheet of dates and durations is a better answer than trying to remember how a few months went. Useful before starting a longer fast, or if you manage a condition alongside fasting.

Do your own analysis

Burn's Insights cover the patterns in your history. If you want to cross-reference your fasts against something Burn does not track, the raw rows are there.

Keep it if you leave

An export means your history is not locked to one app. If you stop using Burn, months of fasts leave with you as a file rather than disappearing.

Where your data lives

Your history stays where you can reach it

ON YOUR DEVICE

Your fasts, stored locally

The timer, your history and everything in the Journal are held on your iPhone. The app works without a connection.

IF YOU ENABLE IT

Your own iCloud, for sync

Turn on sync and your history moves between your iPhone, iPad and Apple Watch through your own iCloud account.

UNDER YOUR CONTROL

Your Apple account settings apply

Anything synchronized through iCloud is associated with your Apple account, so the controls you already have over it apply to your fasting history too.

Read the privacy policy → Burn on Apple Watch →

Alongside the export

Most questions are answered without opening a spreadsheet

The export is there for the times you want the raw rows. Day to day, Insights and the Journal already show the patterns, the averages and the records, so the file is a backstop rather than the main way to read your history.

Insights, for the patterns

Averages by week, month and all time, stat tiles, and twelve personal records with the dates they were set.

The Journal, for a single day

Tap any date for the fasts it held, the Body Score, your check-ins and anything you logged.

Insights → The Journal →

WHAT AN EXPORT IS NOT

A record of what you did, not a medical file

The file holds what you logged and what the timer recorded. Burn maps elapsed time to named stages and does not measure ketosis, autophagy, or metabolic state, so nothing in the export is a physiological measurement.

The ketone and glucose figures are the ones you entered yourself, from your own tests.

Your history, and a copy of it

Every fast recorded on your device, and exportable as CSV whenever you want it.

Download free on the App Store

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