Comparison

Morfify Sleep vs Calorie Burndown

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Morfify Sleep

Features
Read full description

Morfify Sleep helps improve sleep position and avoid snoring using iPhone or Apple Watch motion sensing together with intelligent feedback and gentle nudging. Works on iPhone alone or together with Apple Watch. Sleep position can influence breathing comfort, nighttime snoring tendencies, and breathing disturbances during sleep. Morfify Sleep helps users become more aware of body position and actively change it during sleep and supports healthier nighttime positioning habits through gentle haptic feedback and optional audio signals designed to help reduce unwanted sleeping positions commonly associated with snoring and breathing discomfort. Designed for wellness and sleep-position awareness, Morfify Sleep combines iPhone or Apple Watch motion tracking, haptic and audio feedback, and session insights to help users improve nighttime movement and positioning patterns. Features: โ€ข iPhone or Apple Watch sleep-position monitoring โ€ข Gentle haptic and audio feedback โ€ข Sleep position coaching and habit awareness โ€ข Standalone iPhone and/or Apple Watch monitoring โ€ข Wear your iPhone or Apple Watch on your chest during sleep for accurate position tracking โ€ข Integration with Apple Health and HealthKit on Apple Watch โ€ข Automatic synchronization between Apple Watch and iPhone โ€ข Session history and insights โ€ข Smart nighttime guidance โ€ข Optimized for iPhone and Apple Watch Morfify Sleep is intended for wellness and informational purposes only and is not a medical device. Terms of Use: https://morfify.com/terms Privacy Policy: https://morfify.com/privacy

About

Calorie Burndown

Features
Read full description

Calorie Burndown answers one question the Health app doesn't: given what you've eaten and burned today, how much room do you have left? It reads those numbers straight from HealthKit, does the arithmetic against a goal you set, and shows the answer on your phone, your Lock Screen, and your wrist. WHAT YOU'LL NEED Calorie Burndown doesn't log food and doesn't estimate your metabolism โ€” it reads what's already in Health. So you'll want a calorie-tracking app writing what you eat to Health, and an Apple Watch recording what you burn. If you already track both, this turns them into a number neither one gives you. If you don't, this app has nothing to read and won't be much use. EVERY FEATURE IS FREE No paywall, no subscription, nothing locked. The in-app purchases are optional tips โ€” they unlock nothing, and the app behaves identically whether or not you ever use them. WORKS EVERYWHERE YOU DO - iPhone app with an iPad-optimized layout - A home screen widget that shows your remaining budget at a glance - Lock Screen widgets, so it's there without unlocking - A watchOS companion app with real-time numbers, even without your phone nearby - Watch face complications and Smart Stack widgets BUILT ON HEALTHKIT, NOT A SEPARATE DATABASE There's no food database here, no barcode scanner, and no second place to log things. Keep using whatever app you already use; Calorie Burndown reflects it automatically. Your health data is read on your device and never leaves it โ€” there is no account, no server, and nothing to sign up for. YOUR WATCH WORKS ON ITS OWN The Watch app queries HealthKit directly, independent of your phone, so you get a real-time deficit number on a run or at the gym even if you left your phone at home. Settings and progress stay in sync across devices whenever they're near each other. WEEKLY CHECK-IN AND TRENDS A simple weekly check-in helps you see the bigger trend, not just today's number, and History charts your weight against the pace your target implies. IF YOU WANT TO SAY THANKS Settings has a tip jar with three sizes. That is the only place money is ever mentioned. It grants no features, removes no limits, and nothing in the app changes if you skip it. Calorie Burndown does not diagnose, treat, or provide medical advice โ€” it's a simple deficit calculator built on data you're already tracking in Health.

Screenshots

Morfify Sleep4 screens
Calorie Burndown4 screens

Verdict

The call

The clearest difference is update cadence: Calorie Burndown at every 3 days against Morfify Sleep's every 9 days. Morfify Sleep's advantage is iOS requirement (16.6 vs 26.5). On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Morfify Sleep sells 2 in-app purchases, starting at $9.99 per month and Calorie Burndown sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Morfify Sleep ships an update every 9 days, Calorie Burndown every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard2 real differences ยท 4 level
Morfify Sleep versus Calorie Burndown: the parameters behind the verdict, then further details
ParameterMorfify SleepCalorie Burndown
PriceFreeFree
Update frequencyEvery 9 daysEvery 3 days โ€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, Apple WatchiPhone, iPad, Apple Watch โ€” better
Requires iOS16.6 โ€” better26.5
Further details โ€” not scored
Size14 MB6 MB
Age rating4+4+
DeveloperHenrik Rytter JensenKevin McMahon

In-app purchases

2 purchases

Morfify Sleep

Subscriptions2
  • Morfify Premium Monthly14 Days trial$9.991 Month
  • Morfify Premium Annual14 Days trial$59.991 Year
3 purchases

Calorie Burndown

One-time3
  • Buy me a coffee$1.99
  • Buy me a few coffees$4.99
  • Buy the whole round$9.99

Questions

Is Morfify Sleep free?
Morfify Sleep is free to download, with in-app purchases available.
Is Calorie Burndown free?
Calorie Burndown is free to download, with in-app purchases available.
Do Morfify Sleep or Calorie Burndown have ads?
Neither Morfify Sleep nor Calorie Burndown shows ads.
Which is updated more often, Morfify Sleep or Calorie Burndown?
Morfify Sleep ships an update every 9 days, and Calorie Burndown every 3 days. Most recently, Morfify Sleep was updated on October 25, 2026 and Calorie Burndown on October 24, 2026.

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