Sleep Time vs SleepSpace
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sleep Time
This app helps you fall asleep, stay asleep, and wake up refreshed with advanced sleep cycle analysis and a smart alarm. It offers detailed sleep tracking, soundscapes, and integration with Apple Health.
- Smart alarm clock with single gesture setting
- Sleep cycle analysis
- Soundscapes and white noise for falling asleep
- Detailed monthly and weekly sleep graphs
- Apple Health integration
- Instant Heart Rate integration
- Cloud backup and restore
Read full descriptionHide 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
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.
- 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
Read full descriptionHide 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
Verdict
The clearest difference is rating: Sleep Time at 4.7 against SleepSpace's 4.2. Sleep Time also leads on review sentiment (76% vs 56%) and ratings volume (5.4K vs 857). SleepSpace's advantage is ads (none vs shown) and update cadence (weekly vs monthly). On price, in-app purchases, monetization model 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
Both are free to download. Sleep Time 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.
Sleep Time holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Sleep Time has 5.4K ratings behind it against 857, so its average is the more settled of the two. Written reviews point the same way: 76% of Sleep Time's written reviews are positive against 56% of SleepSpace's.
Sleep Time ships an update monthly, SleepSpace weekly. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.
| Parameter | Sleep Time | SleepSpace |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (5.4K ratings) — better | 4.2 (857 ratings) |
| Positive reviews | 75.8% of reviews — better | 56.4% of reviews |
| Number of ratings | 5.4K — better | 857 |
| Update frequency | Monthly | Weekly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 165 MB | 134 MB |
| Age rating | 4+ | 4+ |
| Developer | Azumio Inc. | Proactive Life Inc |
Customer experience
Sleep Time
SleepSpace
User reviews
Sleep Time
From 5.4K App Store ratingsWhat we love
- 👍 Generally a great free app
- 👍 Accurate sleep tracking
- 👍 Gentle alarm wakeup
- 👍 Helpful for sleep insights
- 👍 Dependable app for years
Room to improve
- 🐛 Alarm doesn't always go off
- 🔊 Loud ads that can't be closed
- 🔋 Drains battery
- 🤔 Inaccurate sleep tracking
- 🐛 Crashes and bugs after updates
SleepSpace
From 857 App Store ratingsWhat 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
Reported bugs
4 issues- Alarm not playing sound
- App crashes when trying to view sleep history
- Unable to change alarm time
- Sleep data not recording properly
Requested features
4 requests- Allow alarm to play through headphones
- Provide more sleep sound options in free version
- Add ability to manually input sleep time
- Improve ad placement and volume control
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
Sleep Time
- Premium$4.991 Month
- Premium$8.991 Month
- Premium$9.991 Month
Show 5 moreShow fewer
- Premium7 Days trial2 variants$9.991 Month
- Premium$19.993 Months
- Premium$29.991 Year
- Premium1 Month trial2 variants$29.991 Year
- Premium$39.991 Year
SleepSpace
- 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 moreShow fewer
- 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
- Lifetime SleepSpace Premium$199.99
- Dave Asprey Lifetime$199.99
Questions
Is Sleep Time free?
Is SleepSpace free?
Which has better reviews, Sleep Time or SleepSpace?
Do Sleep Time or SleepSpace have ads?
Which is updated more often, Sleep Time or SleepSpace?
Other comparisons















