Comparison

SleepSafe vs Lung

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

Head to head
About

SleepSafe

This app uses your Apple Watch to detect and gently interrupt nightmares, sleepwalking, and night terrors. It offers features like sleep talking recording, personalized sleep analysis, and stress monitoring to help you achieve calmer, more restful sleep.

Highlights
  • Real-time nightmare detection
  • Sleep talking recorder
  • Gentle haptic interventions
  • Night terror protection
  • Comprehensive sleep analysis
  • Stress & anxiety monitoring
Features
Read full description

Wake up calmer. SleepSafe is the only Apple Watch app that detects nightmares, night terrors, and sleepwalking as they happen — then gently guides you back to peaceful sleep with subtle taps, before the episode escalates. Built for people living with PTSD, anxiety, restless sleep, and recurring bad dreams, SleepSafe watches over you all night so you can finally rest. KEY FEATURES - Real-Time Nightmare Detection: On-device machine learning reads Apple Watch heart rate and motion sensors up to 4x per second to catch nightmares the moment they begin - Night Terror Protection: Detects sudden heart-rate spikes and intervenes instantly to stop night terrors before they take hold - Gentle Haptic Interventions: Soft, escalating Apple Watch taps ease you out of a nightmare without jarring you awake - Wake-Me-Up Mode: Optional stronger haptics fully wake you when a severe nightmare or night terror is detected - Sleep Talking Recorder: Captures and transcribes sleep talking, sounds, and movement overnight, stored securely on-device for complete privacy - Comprehensive Sleep Analysis: Track sleep stages (REM, Core, Deep), duration, and quality to understand your night and sleep better - Personalized Sleep Score: See your sleep improve over time with nightly performance tracking - Stress & Anxiety Insights: Physiological trends reveal what may be disrupting your sleep - Sleep Trends Dashboard: Real-time sleep debt and history in one clear, intuitive view - Fully Customizable: Toggle every feature to fit your needs — anxiety, restless legs, night terrors, or PTSD nightmares YOUR PRIVACY COMES FIRST All audio recording and machine-learning analysis happen entirely on your device. Your most personal moments never leave your Apple Watch and iPhone. Stay calm, collected, and safe through the night — and finally sleep better. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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

SleepSafe4 screens
Lung4 screens

Verdict

The call

The clearest difference is in-app purchases: Lung at none against SleepSafe's 2. Lung also leads on update cadence (every 3 days vs every 2 weeks). On price, ads, 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. SleepSafe sells 2 in-app purchases, starting at $6.99 per month. Lung asks for nothing beyond the download.

UpkeepUpdate frequency

SleepSafe ships an update every 2 weeks, Lung every 3 days. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 8 level
SleepSafe versus Lung: the parameters behind the verdict, then further details
ParameterSleepSafeLung
PriceFreeFree
Rating4.5 (11 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings11 — better—
Update frequencyEvery 2 weeksEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, Apple WatchiPhone, Apple Watch
Requires iOS17.017.0
Further details — not scored
Size51 MB4 MB
Age rating4+4+
DeveloperOliver Lerstøl HebnesRobert Lenart

In-app purchases

2 purchases

SleepSafe

Subscriptions2
  • Monthly Premium7 Days trial$6.991 Month
  • Yearly Premium$44.991 Year
None

Lung

No in-app purchases

Questions

Is SleepSafe free?
SleepSafe is free to download, with in-app purchases available.
Is Lung free?
Lung is free to download, with no in-app purchases.
Do SleepSafe or Lung have ads?
Neither SleepSafe nor Lung shows ads.
Which is updated more often, SleepSafe or Lung?
SleepSafe ships an update every 2 weeks, and Lung every 3 days. Most recently, SleepSafe was updated on October 25, 2026 and Lung on October 11, 2026.

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