Comparison

Sleep Time+ Cycle Alarm Clock vs SleepSpace

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

Head to head
About

Sleep Time+ Cycle Alarm Clock

Understand your sleep patterns and wake up feeling refreshed. This app tracks sleep cycles, offers soothing soundscapes for falling asleep, and measures resting heart rate without wearables. It provides detailed analysis and customizable alarms to optimize your sleep and wake-up experience.

Highlights
  • Sleep cycle analysis
  • Soothing soundscapes
  • Resting heart rate measurement
  • Smart alarm clock
  • Detailed sleep graphs
  • Apple Health integration
Features
Read full description

Fall asleep, stay asleep, and wake up refreshed! Sleep Time is a complete sleep tracker and smart alarm clock. Place your phone on the bed and Sleep Time analyzes your sleep cycles through the night, then wakes you during your lightest sleep within your chosen window — so you start the day rested instead of groggy. Trusted by over 35 million users, Sleep Time is an award-winning sleep app. ------------------ 5/5 “I finally understand why I wake up tired some mornings. Sleep Time showed me my sleep cycles, and the smart alarm has made my mornings so much easier — I haven’t hit snooze in weeks.” 5/5 “I’ve tried several apps that log sleep duration and stages, and the interface of Sleep Time is the best by far. It’s easy to understand and simple to use.” 5/5 “Fascinating results. It works remarkably well providing helpful information.” Featured on: TechCrunch, Mashable, Lifehacker, 148apps, eHealth, and many others. ----------------- MAIN FEATURES √ Set the alarm clock with a single gesture √ Fall asleep to soothing soundscapes and white noise √ Alarm rings even in silent mode √ Choose from 20 built-in alarm sounds √ Wake up to your favorite song from your music library √ Sleep Lab™ with light, deep, and REM sleep analysis √ Detailed daily, weekly, and monthly graphs √ Smart wake-up window for a gentler start to the day √ Full history makes night-to-night comparison easy √ Cloud backup and restore for your sleep data √ Clear, easy-to-read interface √ Apple Health integration We build Sleep Time for our users and would love your feedback. Tell us what you think so we can keep improving the app. Upgrade to Premium for unlimited soundscapes, advanced sleep insights, priority support, and an ad-free experience with an auto-renewable subscription. We offer auto-renewable subscriptions with the following terms: - Payment will be charged to your iTunes account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - No cancellation of the current subscription is allowed during active subscription period - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication - Our privacy policy and terms of use: https://www.azumio.com/page/privacypolicy Sweet Dreams, Azumio Team

About

SleepSpace

This app helps you fall asleep faster, sleep more deeply, and wake up refreshed with adaptive sounds, smart alarms, and personalized sleep tracking. It functions as a complete sleep system, integrating with your phone, wearables, or smart bedroom devices to strengthen natural sleep rhythms.

Highlights
  • Adaptive sounds for falling asleep
  • Smart alarm for refreshed waking
  • Personalized sleep tracking
  • Integration with wearables and smart devices
  • AI-powered sleep assistant
  • Privacy-first design
Features
Read full description

Sleep tracking tells you what happened. SleepSpace helps you change what happens tonight. Fall asleep with adaptive sound, support deeper sleep through the night, wake during a lighter sleep phase, and understand your recovery with personalized sleep insights. Designed by sleep scientist Dr. Dan Gartenberg, SleepSpace brings together your phone, wearables, and guided sleep programs into one complete sleep system. Built on peer-reviewed research and more than $4M in NIH-funded sleep science. Featured by TED, NPR, CNN, The NYTimes, TIME, Reuters, Human Upgrade, Ben Greenfield Life, Sleep Review, & more. FALL ASLEEP FASTER Wind down with relaxing sounds, guided breathing, meditations, and gentle biofeedback. SleepSpace helps your body transition into sleep with calming bedtime routines. SLEEP DEEPER Use adaptive sound masking and overnight sleep support to reduce disruptions and promote a more stable night. Track sleep stages, snoring, awakenings, recovery, and sleep quality with clear insights. Choose sounds for your goals, including meditations, white noise, nature sounds, dream support, and sound patterns designed to support deeper, more restorative sleep. WAKE UP REFRESHED Wake during a lighter sleep phase with a smart alarm designed to reduce morning brain fog. Use smart sound or Apple Watch vibration to wake gently without disturbing your partner. Start the day with a clearer view of your recovery, alertness, and next best steps. TRACK SLEEP YOUR WAY SleepSpace works with: • Your phone on the nightstand or mattress • Apple Watch sleep tracking informed by peer-reviewed research • Popular wearables such as Oura and WHOOP • SleepSpace Charger and connected sleep devices • A clinically inspired sleep diary based on the consensus sleep diary Your data is unified into one clear sleep, recovery, and alertness view. PERSONALIZED SLEEP PROGRAMS Build a nightly Sleep Journey with sounds, wake windows, and routines tailored to your goals. Follow structured sleep programs inspired by evidence-based behavioral sleep techniques, including cognitive behavioral therapy for insomnia. DAILY ALERTNESS AND GUIDANCE See how your sleep affects daytime energy, focus, and recovery. Get simple daily tasks to support better sleep habits over time. AI-POWERED SLEEP SUPPORT Dr. Snooze™ is your built-in AI sleep assistant, offering tips based on your sleep patterns. When you need extra support, you can also connect with a human coach. PRIVACY-FIRST DESIGN SleepSpace works offline and in airplane mode. Sound is analyzed as decibel levels and is not recorded unless you explicitly enable recording. Your sleep data stays private and secure. SleepSpace is built on HIPAA-compliant backend infrastructure with safeguards for health data, including encryption, access controls, audit logging, and secure data handling practices. IMPORTANT INFORMATION SleepSpace is designed for general wellness and sleep support. It is not intended to diagnose, treat, cure, or prevent any disease or medical condition. Consult a qualified healthcare professional for medical concerns. SleepSpace syncs with Apple Health to measure sleep and sleep-related health data. Support messages are voluntarily shared through Intercom. SUBSCRIPTION PRICING & TERMS SleepSpace includes a 7-day free trial. After the free trial, a subscription is required to continue using premium features. Payment will be charged to your Apple ID account at confirmation of purchase. Your subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. Terms: https://sleepspace.com/sleepspace-terms-of-use/ Privacy: https://sleepspace.com/privacy-policies/

Screenshots

Sleep Time+ Cycle Alarm Clock4 screens
SleepSpace4 screens

Verdict

The call

The clearest difference is rating: Sleep Time+ Cycle Alarm Clock at 4.8 against SleepSpace's 4.2. Sleep Time+ Cycle Alarm Clock also leads on review sentiment (69% vs 56%). SleepSpace's advantage is monetization model (free with in-app purchases vs subscription) and ads (none vs shown). On price, ratings volume, in-app purchases 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. Sleep Time+ Cycle Alarm Clock sells 8 in-app purchases, starting at $4.99 per month and SleepSpace sells 12 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Sleep Time+ Cycle Alarm Clock holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 2.5K and 857 respectively. Written reviews point the same way: 69% of Sleep Time+ Cycle Alarm Clock's written reviews are positive against 56% of SleepSpace's.

UpkeepUpdate frequency

Sleep Time+ Cycle Alarm Clock ships an update monthly, SleepSpace weekly. The most recent releases landed on August 18, 2026 and September 9, 2026 respectively.

Scorecard6 real differences · 4 level
Sleep Time+ Cycle Alarm Clock versus SleepSpace: the parameters behind the verdict, then further details
ParameterSleep Time+ Cycle Alarm ClockSleepSpace
PriceFreeFree
Rating4.8 (2.5K ratings) — better4.2 (857 ratings)
Positive reviews68.8% of reviews — better56.4% of reviews
Number of ratings2.5K — better857
Update frequencyMonthlyWeekly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhoneiPhone, iPad, iPod, Apple Watch — better
Requires iOS16.015.0 — better
Further details — not scored
Size142 MB134 MB
Age rating4+4+
DeveloperAzumio Inc.Proactive Life Inc

Customer experience

Sleep Time+ Cycle Alarm Clock

All ratings2,483 ratings
Positive95.2%
Neutral1.0%
Negative3.7%
Written reviews459 reviews
Positive68.8%
Neutral7.0%
Negative24.2%

SleepSpace

All ratings857 ratings
Positive78.8%
Neutral7.1%
Negative14.1%
Written reviews211 reviews
Positive56.4%
Neutral8.1%
Negative35.5%

User reviews

Sleep Time+ Cycle Alarm Clock

From 2.5K App Store ratings

What we love

  • 🚀 Helps track sleep patterns
  • 👍 Gentle alarm wakes you up
  • 🌊 Soundscapes help fall asleep
  • 💤 Provides sleep quality insights

Room to improve

  • 🐛 Alarm issues (fails to go off, resets unexpectedly)
  • 🔋 Battery drain
  • 💰 Paywall for core features
  • 🤖 Inaccurate sleep tracking

SleepSpace

From 857 App Store ratings

What we love

  • 🚀 Deeper sleep
  • 👍 Easy to use sleep diary
  • 🔒 Integrates with wearables
  • 👍 Helpful sleep coaching
  • 🚀 Improved sleep quality

Room to improve

  • 🐛 Buggy and crashes
  • 🔋 Battery drain
  • 👎 Requires full access to health data
  • 👎 Obnoxious free trial pop-ups
  • 👎 Inaccurate sleep tracking

Bugs and requests

Sleep Time+ Cycle Alarm Clock

Reported bugs

4 issues
  • Crashes on startup
  • Freezing issues
  • Inconsistent alarm behavior
  • Lost sleep data after updates

Requested features

4 requests
  • Heart rate monitoring integration
  • Sleep data export and analysis
  • Apple Watch companion app
  • More customization options

SleepSpace

Reported bugs

4 issues
  • Frequent crashes
  • Unreliable sleep data
  • Connectivity issues with Apple Watch
  • Notifications not working as expected

Requested features

5 requests
  • Fade in/out for sounds
  • Offline mode support
  • More customization options
  • Better integration with other wearables
  • Improved sleep analysis and reporting

In-app purchases

8 purchases

Sleep Time+ Cycle Alarm Clock

Subscriptions8
  • Premium$4.991 Month
  • Premium$8.991 Month
  • Premium$9.991 Month
Show 5 more
  • Premium7 Days trial2 variants$9.991 Month
  • Premium$19.993 Months
  • Premium$29.991 Year
  • Premium1 Month trial2 variants$29.991 Year
  • Premium$46.991 Year
12 purchases

SleepSpace

Subscriptions10
  • Premium Monthly Subscription1 Month trial$6.991 Month
  • Legacy Dave Asprey Monthly1 Month trial$6.991 Month
  • Premium Monthly Subscription1 Year trial$12.991 Month
Show 7 more
  • Premium Monthly Subscription1 Month trial$12.991 Month
  • Premium Monthly Subscription7 Days trial$12.991 Month
  • Premium Yearly Subscription1 Year trial2 variants$39.991 Year
  • Legacy Dave Asprey Yearly1 Month trial$49.991 Year
  • Premium Yearly Subscription7 Days trial$79.001 Year
  • Premium Yearly Subscription1 Month trial$79.001 Year
  • Premium Yearly Subscription1 Year trial$79.001 Year
One-time2
  • Lifetime SleepSpace Premium$199.99
  • Dave Asprey Lifetime$199.99

Questions

Is Sleep Time+ Cycle Alarm Clock free?
Sleep Time+ Cycle Alarm Clock is free to download, with in-app purchases available.
Is SleepSpace free?
SleepSpace is free to download, with in-app purchases available.
Which has better reviews, Sleep Time+ Cycle Alarm Clock or SleepSpace?
Sleep Time+ Cycle Alarm Clock is rated higher. Sleep Time+ Cycle Alarm Clock averages 4.8 out of 5 from 2.5K ratings, while SleepSpace averages 4.2 from 857 ratings.
Do Sleep Time+ Cycle Alarm Clock or SleepSpace have ads?
Sleep Time+ Cycle Alarm Clock shows ads; SleepSpace does not.
Which is updated more often, Sleep Time+ Cycle Alarm Clock or SleepSpace?
Sleep Time+ Cycle Alarm Clock ships an update monthly, and SleepSpace weekly. Most recently, Sleep Time+ Cycle Alarm Clock was updated on August 18, 2026 and SleepSpace on September 9, 2026.

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