Comparison

SleepSync vs Lung

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

Head to head
About

SleepSync

Optimize your sleep cycles to wake up feeling refreshed. This app calculates your ideal bedtime and wake-up time based on sleep science, offering insights into deep sleep and REM stages. Enjoy a user-friendly interface designed for a better night's rest.

Highlights
  • Personalized sleep schedule
  • Deep sleep and REM analysis
  • Intuitive sleep calculator
  • Advanced sleep cycle tracking
  • User-friendly interface
  • Privacy focused
Features
Read full description

Wake up feeling refreshed and rejuvenated every morning with SleepSync, your personal sleep calculator and bedtime scheduler. Designed to enhance your sleep quality by optimizing your sleep cycles, SleepSync ensures you fall asleep and wake up at the perfect times for maximum restfulness. Why SleepSync? Personalized Sleep Schedule: Discover your ideal bedtime and wake-up time based on scientific sleep cycle analysis, tailored specifically to your lifestyle. Deep Sleep and REM Analysis: Dive deep into your sleep patterns with advanced tracking of your deep sleep and REM cycles, enabling targeted improvements to your sleep quality. Features: Intuitive Sleep Calculator: Simply input your desired wake-up time to calculate the best times to go to sleep. Advanced Sleep Cycle Tracking: Leverage the power of sleep science to analyze your sleep phases and adjust your bedtime for optimal rest. User-Friendly Interface: Enjoy a seamless experience with SleepSync's elegant and easy-to-navigate design. Privacy First: Your sleep data belongs to you. SleepSync ensures your information is secure and never shared. Whether you're looking to improve your sleep quality, wake up more refreshed, or simply find the best time to go to bed, SleepSync is here to transform your nights and mornings. Start your journey towards better sleep and a more energetic day with SleepSync.

About

Lung

Features
Read full description

LUNG: Your pocket breathing app for instant calm. Stressed? Anxious? Can’t sleep? LUNG helps you breathe like a pro in seconds. Unlock breathing hacks loved by doctors and backed by science: • Box Breathing (1-1-1-1) – inhale, hold, exhale, hold – all the same length. The classic for instant clarity and nerves of steel. Perfect when you're feeling like a jittery squirrel on caffeine. • Calm (4-2-4) – 4 seconds in, 2 hold, 4 out. Gentle calm-down mode when you need to chill fast without breaking a sweat. • Relax (4-7-8) – 4 in, 7 hold, 8 out. Dr. Weil's famous sleep hack. Works so well, folks often nod off before they even hit the 7-second count. • Simple (1-1) – even in and out breaths. The no-brainer for on-the-go or when your mind's doing loop-de-loops. • Unwind / Deep Calm (1-2) – inhale for 1 part, exhale for 2. The quickest way to kick your chill mode into gear. Double exhale = double the relaxation vibes. Great for just "blowing away" that stress. • Meditation – a no-fuss timer for zen sessions from 1 to 60 minutes, ending with a gentle "time's up!" nudge. Say goodbye to those sneaky "just five more minutes" traps. Quickly lower stress, slow your heart rate and clear your mind. Features • Beautiful glowing visual guide • Haptic feedback – breathe with eyes closed • Focus Mode - pure animation, no disturbance • High-quality relaxing sounds • 100% private – no ads, no tracking, no account Perfect for panic attacks, falling asleep faster, focus & daily stress relief. Breathe deeper. Stress less. Exhale the chaos!

Screenshots

SleepSync3 screens
Lung4 screens

Verdict

The call

The clearest difference is ads: Lung at none against SleepSync's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 8 level
SleepSync versus Lung: the parameters behind the verdict, then further details
ParameterSleepSyncLung
PriceFreeFree
Rating3.7 (3 ratings) — better—
Number of ratings3 — better—
Update frequency—Every 3 days
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS16.0 — better17.0
Further details — not scored
Size10 MB4 MB
Age rating4+4+
DeveloperAPPS BAY LIMITEDRobert Lenart

In-app purchases

None

SleepSync

No in-app purchases

None

Lung

No in-app purchases

Questions

Is SleepSync free?
SleepSync is free to download, with no in-app purchases.
Is Lung free?
Lung is free to download, with no in-app purchases.
Do SleepSync or Lung have ads?
SleepSync shows ads; Lung does not.

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