Comparison

Sleep Calculator vs EmberKeep

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

Head to head
About

Sleep Calculator

Features
Read full description

Your Brain Needs Good Sleep to Stay Healthy Not getting enough quality sleep can really hurt your body and mind: - Forgetfulness: Poor sleep messes with your memory and makes it harder to remember things. - Brain Buildup: When you don’t get deep sleep, harmful stuff can build up in your brain, which is linked to diseases like Alzheimer’s. - Mood Swings: Lack of sleep makes anxiety and depression worse, and faster. - Faster Aging: Even one bad night can make your body age quicker at the cellular level. - Weight & Blood Sugar Problems: Bad sleep confuses your body, making it harder to manage weight and blood sugar. The science is clear Your body requires complete 90-minute sleep cycles. Here's why that matters for your health: - Sharper Brain: Each full cycle helps your brain process memories, boost focus, and clear out mental fog. - Deeper Recovery: You only hit the most healing stages of sleep (like deep and REM) when you complete the full cycle. - Balanced Hormones: Full sleep cycles help regulate key hormones like cortisol, insulin, and melatonin, keeping your mood, metabolism, and energy in check. - Stronger Immunity: Completing cycles gives your immune system the time it needs to repair, recharge, and fight off illness. This App Fixes What You're Doing Wrong We Do the Math for Perfect Sleep You Have Two Choices: 1. Continue bad sleep patterns and suffering the consequences 2. Let science optimize your sleep starting tonight The difference between these choices determines whether you'll be sharp and healthy at 50... or forgetful, overweight, and chronically exhausted. Download Now Before Another Night Damages Your Brain Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/sleep-calculator-wake-up/privacy-policy

About

EmberKeep

Features
Read full description

Build a routine. Grow a place of your own. Emberkeep turns everyday habits into an illustrated keep that grows with your consistency. Start small, save your progress, and make a home for your routines. TRACK YOUR WAY Create simple check-offs, measured goals, timers, avoidance goals, and step-by-step routines. Add water or pages throughout the day, pause and resume a timer, and return to an unfinished checklist. Partial effort stays saved. A CLEAR PLAN FOR TODAY See remaining habits first, with completed and skipped habits below. Use flexible schedules, reminders, rest days, and pause controls. Review and correct recent history. MAKE YOUR KEEP YOUR OWN Reach six illustrated building stages through qualifying active days. Choose finishes and display furnishings, titles, painted themes, alternate app icons, and celebration styles. Craft favorite rewards with shards. Missed days do not take your buildings away. UNDERSTAND YOUR PROGRESS Explore habit history, streaks, schedule-aware completion rates, and weekly reflections. Daily deeds, a weekly challenge, character attributes, and long-term mastery give your progress extra meaning. PRIVATE AND FREE No account, ads, subscription, or tracking. Your data stays on your devices and in your private iCloud when sync is available. Optional, read-only Apple Health linking supports compatible habits. Export backups from Settings. Built for iPhone and iPad, with widgets, Siri shortcuts, Dynamic Type, VoiceOver labels, and Reduce Motion support.

Screenshots

Sleep Calculator4 screens
EmberKeep4 screens

Verdict

The call

The clearest difference is in-app purchases: EmberKeep at none against Sleep Calculator's 1. Sleep Calculator's advantage is update cadence (weekly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Sleep Calculator sells 1 one-off in-app purchase. EmberKeep asks for nothing beyond the download.

UpkeepUpdate frequency

Sleep Calculator ships an update weekly, EmberKeep every 2 months. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

Scorecard2 real differences Β· 4 level
Sleep Calculator versus EmberKeep: the parameters behind the verdict, then further details
ParameterSleep CalculatorEmberKeep
PriceFreeFree
Update frequencyWeekly β€” betterEvery 2 months
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.617.0 β€” better
Further details β€” not scored
Size13 MB55 MB
Age rating4+4+
DeveloperTharindu PrabathJerry Crews

In-app purchases

1 purchases

Sleep Calculator

One-time1
  • Sleep Calculator Premium$2.99
None

EmberKeep

No in-app purchases

Questions

Is Sleep Calculator free?
Sleep Calculator is free to download, with in-app purchases available.
Is EmberKeep free?
EmberKeep is free to download, with no in-app purchases.
Do Sleep Calculator or EmberKeep have ads?
Neither Sleep Calculator nor EmberKeep shows ads.
Which is updated more often, Sleep Calculator or EmberKeep?
Sleep Calculator ships an update weekly, and EmberKeep every 2 months. Most recently, Sleep Calculator was updated on October 13, 2026 and EmberKeep on October 10, 2026.

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