Comparison

Eight Sleep vs LightKing

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

Head to head
About

Eight Sleep

This advanced sleep system intelligently adjusts temperature and elevation for personalized comfort. It tracks detailed sleep metrics, offering insights and recommendations to help you wake up refreshed. Supports up to two users with individual profiles and customizable wake-up features.

Highlights
  • Personalized temperature control
  • Intelligent sleep tracking
  • Autopilot for automatic adjustments
  • Sleep stage analysis
  • Customizable vibration alarm
  • Dual sleep profiles
Read full description

Introducing Pod 6. The setup is as effortless as your sleep. Guided Hub setup gets you paired in minutes, a live priming screen decodes your Pod's lights in real time so you're never guessing, and Solo Pod owners get a path built just for them. Your best sleep starts tonight. The Eight Sleep Pod is the intelligent sleep system that gives you up to one hour more of sleep every night. It cools. It heats. It elevates. PERSONALIZED SLEEP WITH AUTOPILOT Autopilot is the intelligence behind the Pod. It adjusts your temperature and elevation to perfect your sleep experience. LEARN ABOUT YOUR SLEEP AND HEALTH View your sleep stages, time slept, heart rate, HRV, and snoring. Plus, receive personalized insights and recommendations. WAKE UP REFRESHED With customizable chest-level vibration and a gradual thermal change, you will wake up gently and feel fully refreshed. TWO SLEEP PROFILES PER POD Autopilot creates a profile for up to two individuals on the same Pod and refines overtime. Have questions? We’re here to help. Email us at support@eightsleep.com. Terms of Use: - www.eightsleep.com/app-terms-conditions/ - www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

LightKing

Features
Read full description

LightKing is a daylight closer. Your Apple Watch already measures Time in Daylight. We ping you when today's pace is slipping, while you still have time to get outside. HOW IT WORKS Set a daily daylight goal, reminder fequency, and a light window (default 30 minutes, 8:00 to 18:00). LightKing monitors Time in Daylight from Apple Health. We never write samples and we never upload your minutes. If you fall behind, you get a ping with enough time to get outside. *RECENT APPLE WATCH REQUIRED Time in Daylight comes from Apple Watch (SE 2, Series 6, or Ultra). iPhone cannot measure this. No Watch means an empty day. Allow Health, Notifications, and Background App Refresh. FREE AND PRO Free: Progress, morning motivation, celebrations, and 3 Rescue Ping days that count only when they work. Pro: Unlimited behind-pace pings. Try it free for 7 days. Cancel anytime in App Store subscriptions. Your daylight time stays on your device. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Eight Sleep4 screens
LightKing4 screens

Verdict

The call

Eight Sleep and LightKing are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Eight Sleep sells 2 in-app purchases, starting at $18.99 per month and LightKing sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Eight Sleep versus LightKing: the parameters behind the verdict, then further details
ParameterEight SleepLightKing
PriceFreeFree
Rating4.8 (18K ratings) — better—
Positive reviews28.6% of reviews—
Number of ratings18K — better—
Update frequencyEvery 4 days—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS18.017.6 — better
Further details — not scored
Size265 MB17 MB
Age rating12+4+
DeveloperEight Sleep, IncFrank Sloan

Bugs and requests

Eight Sleep

Reported bugs

5 issues
  • App freezes and loses connection to pod
  • Alarms not working or turning off properly
  • Temperature settings not saving or resetting
  • Sleep data not syncing or displaying accurately
  • Frequent app crashes and performance issues

Requested features

5 requests
  • Apple Watch app integration
  • Offline temperature/alarm controls
  • Customizable sleep tracking and insights
  • Improved alarm snooze/dismiss functionality
  • Nap mode and more sleep schedule flexibility

LightKing

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Eight Sleep

Subscriptions2
  • 8+ Pro (Monthly)$18.991 Month
  • 8+ Pro (Annual)$179.991 Year
2 purchases

LightKing

Subscriptions2
  • LightKing Pro: Monthly7 Days trial$0.991 Month
  • LightKing Pro: Founder Annual7 Days trial$9.991 Year

Questions

Is Eight Sleep free?
Eight Sleep is free to download, with in-app purchases available.
Is LightKing free?
LightKing is free to download, with in-app purchases available.
Do Eight Sleep or LightKing have ads?
Neither Eight Sleep nor LightKing shows ads.

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