Watch your body switch into fat burning, ketosis and autophagy in real time. One tap to start, live stages on your Lock Screen, and a Body Score for every fast.
Burn is an intermittent fasting tracker that shows exactly what your body is doing, hour by hour. Start a fast in one tap and watch fat burning, ketosis and autophagy arrive in real time.
WHAT MAKES BURN DIFFERENT
Most fasting apps give you a countdown. Burn gives you the biology behind it.
As your fast progresses you can see glycogen dropping, fat burning starting, ketosis beginning and autophagy switching on. When you can see the stages, every hour feels earned.
SEE EVERY FASTING STAGE
Follow your fast through Fed, Catabolic, Fat Burning, Ketosis and Autophagy on a live timeline, so you always know where you are and what comes next. Stages are educational estimates built to keep you motivated and consistent.
ONE SCORE FOR EVERY FAST
Body Score combines your fasting consistency and your weight trend into a single number. Instead of judging progress by the scale alone, you get a clearer view of whether your routine is actually moving in the right direction.
EVERY PLAN, FROM BEGINNER TO ADVANCED
16:8 to start and learn the rhythm
18:6 and 20:4 when you are ready to go deeper
OMAD for one meal a day
Extended and open-ended fasts with no time cap
Custom windows for any schedule that fits your life
ALWAYS IN VIEW
Home Screen and Lock Screen widgets
Live Activities and Dynamic Island
Apple Watch app and complications
Smart notifications at the moments that matter
HealthKit sync and iCloud backup
Dark Mode
TRACK WHAT CHANGES
Log your weight, review every completed fast, build streaks, hit personal records and watch your trends over weeks and months rather than days.
FREE TO START
The core fasting timer is free with no usage limits. Burn Pro unlocks Body Score, Apple Watch, widgets, advanced insights and analytics, history editing, progress trends and personal records.
Whether this is your first 16:8 or your fiftieth extended fast, Burn stays out of the way and lets the timer do the talking.
Download Burn and start your next fast.
IMPORTANT INFORMATION
Burn is a health and fitness tracking tool. It does not provide medical advice, diagnosis or treatment. Fasting stages, insights and health information are educational estimates only. Speak with a qualified healthcare professional before starting a fasting routine, especially if you have a medical condition, are pregnant, underweight, have a history of eating disorders, or take medication.
Privacy Policy:
https://wraithbit.com/burn-privacy-policy/
Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Download Burn and start your next fast.
Really engaging visually and very informative, not just a basic timer and the Home Screen widgets are really fantastic, could have more features but purely for fasting it’s one of the better ones out there
Developer Response
Amazing feedback to hear, thank you so very much, we’re very proud of how the app functions and looks and appreciate your kind words. Happy fasting!!Burn
Ai slop? Fix weight tracker please.
BobBobbyMcBobberson
(Edit: adjusted rating down because dev not responsive. I switched to Fasty.) I tried to contact for a bug report but could not find where to do it.I accidentally entered the wrong weight by 100 lbs, so the graph is way off, even after immediately putting in the correct weight. What was odd is that it put the correct weight difference from days ago, but my graph is goofed with no way to edit. Also it dos not seem to update to Apple health with that turned on. When ending the fast, after I met my goal, don’t pressure me to keep fasting.Thanks.
Developer Response
Update: everything below is live as of 1.2.4, along with a pro restore fix. If you ever want to give Burn another look, we’d genuinely like to know whether it holds up now. Hi, thank you for this - genuinely useful, specific feedback, and we've acted on it directly.Weight graph & editing: Fixed. You can now edit or delete any logged weight entry, so a mistaken entry no longer permanently distorts your graph. We also traced and fixed the exact issue you hit: the graph and trend comparisons weren't always using the correct chronological entry, which is why the difference looked like it was pulling from days earlier instead of your last real entry. Both are corrected now.Apple Health sync: Fixed. Weight sync had a permissions issue that could silently fail - it now syncs correctly, and if something ever does go wrong, the app will tell you instead of failing quietly.Ending a fast after hitting your goal: Fixed. Burn no longer pressures you to keep going once you've hit your target - it simply confirms your fast and lets you close it out. Reaching us for bug reports: You're right that this wasn't obvious, and we're actively working on a clearer, direct path for feedback and bug reports from inside the app.Everything above is live in the latest update - if you're able to update and give it another try, we'd genuinely appreciate you taking another look at your rating. And if anything's still off, we'd rather hear it straight from you than guess, so thank you again for spelling it out this clearly.Team Burn
Pro bugs!
Ffsnoneueufhcnfh
I’ve tried every single Apple sync workaround, yet still, somehow, I have to keep initiating pro in the app. Over and over, multiple times per session. Fairly certain I’ll have to request a refund.
Developer Response
Thank you for flagging this, and sorry that you’re having this hassle. Having to re-activate pro repeatedly per session isn’t something we’ve been able to reproduce on our side, which usually means it’s specific to how your subscription is resolving rather than something we can spot in testing. Would you mind emailing support@burnfasting.com? The next update adds a Contact Support option in profile that includes a support ID, which lets us look up your subscription directly and see what’s being returned for your account, that should tell us whether it’s something on our side or the store side, either way, we will get it sorted for you. The Burn Team
Your fast, now visible everywhere.
Lock Screen widgets show your timer, current stage and streak at a glance. Redesigned Body Score with a clear breakdown of every fast. Faster, more accurate stage transitions on the timeline. Fixed a Pro restore issue some users hit after updating.
Every bug report in this release came from a review. Keep them coming.
Version 1.3.0
The developer, WraithBit, Inc, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Identifiers
Usage Data
Other Data
Data Linked to You
The following data may be collected and linked to your identity:
Identifiers
Usage Data
Other Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
Purchases
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
WraithBit, Inc
Size
25.1 MB
Category
Health & Fitness
Compatibility
Requires iOS 18.0 or later.
iPhone Requires iOS 18.0 or later.
iPad Requires iPadOS 18.0 or later.
Mac Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
