Comparison

SleepSpace vs Combi Fit Track

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

Head to head
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/

About

Combi Fit Track

Compare real-time heart rate data from multiple fitness devices simultaneously. Analyze workout recovery, track calories, and view giant heart rate displays for gym visibility. Offers workout history and export options.

Highlights
  • Real-time HR comparison from multiple devices
  • Fullscreen gym display
  • Cooldown countdown timer
  • Heart rate recovery analysis
  • Calorie tracking with multiple formulas
  • 30+ activity types
  • Workout history and JSON export
Features
Read full description

Is your fitness wearable actually tracking your heart rate correctly? CombiFitTrack lets you find out. CombiFitTrack is a real-time heart rate comparison tool that connects to multiple fitness devices simultaneously — Whoop, Apple Watch and Polar H10 chest strap — so you can see exactly how each one performs during your workouts. COMPARE HEART RATE FROM 3 DEVICES Connect your Whoop band, Apple Watch and Polar H10 at the same time. See live BPM from each device side by side on one screen. Choose to track from a single source or use the average of all connected devices. FULLSCREEN GYM DISPLAY Giant heart rate display designed to be visible from across the gym. Tap to switch between Whoop, Watch and Polar as your active source. Perfect for keeping an eye on your BPM during intense sessions. COOLDOWN COUNTDOWN Start a 2-minute cooldown timer at the end of your workout. The app automatically stops and saves when the countdown finishes, giving you accurate recovery data without having to remember to stop manually. HEART RATE RECOVERY ANALYSIS After every workout, CombiFitTrack analyses your heart rate recovery (HRR). See your HRR1 (1-minute drop) and HRR2 (2-minute drop), peak and recovered BPM, and get a rating from Excellent to Poor based on medical benchmarks. CALORIE TRACKING Automatic calorie calculation using watts-based, HR-based (Keytel et al.), or MET formulas depending on available data. Tap the info button to see exactly how your calories were calculated. 30+ ACTIVITY TYPES Choose from running, cycling, swimming, rowing, weightlifting, boxing, yoga and many more. Track which body position each device was worn on for every workout. CUSTOMISE YOUR LOOK Pick any accent colour with the colour picker or choose from quick presets. 6 background styles: Rainbow, Stripes, Diagonal, Bubbles, Waves and Solid. Adjust background brightness with the slider. All styles sync to your Apple Watch. APPLE WATCH COMPANION Dedicated Watch app tracks your heart rate independently. Synced themes and accent colours. The Watch keeps tracking even after you stop on iPhone — no need to restart. WORKOUT HISTORY & EXPORT Review all past workouts with detailed charts showing HR data from every device. Export workout data as JSON for analysis. Recalculate calories using different HR sources. LIVE ACTIVITY See your heart rate on your Lock Screen during workouts with the Live Activity widget. Stays updated even when the app is in the background. PRIVACY FIRST All data stays on your device. Optional Apple Health integration to save workouts. No accounts, no cloud, no tracking.

Screenshots

SleepSpace4 screens
Combi Fit Track4 screens

Verdict

The call

The clearest difference is review sentiment: SleepSpace at 57% against Combi Fit Track's 0%. SleepSpace also leads on price (Free vs $4.99) and update cadence (weekly vs fortnightly). Combi Fit Track's advantage is in-app purchases (none vs 14). On ads and device support 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

SleepSpace is free to download; Combi Fit Track costs $4.99 up front. SleepSpace sells 13 in-app purchases, starting at $6.99 per month. Combi Fit Track asks for nothing beyond the download.

UpkeepUpdate frequency

SleepSpace ships an update weekly, Combi Fit Track fortnightly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard6 real differences · 4 level
SleepSpace versus Combi Fit Track: the parameters behind the verdict, then further details
ParameterSleepSpaceCombi Fit Track
PriceFree — better$4.99
Rating4.2 (858 ratings) — better—
Positive reviews57.0% of reviews — better0.0% of reviews
Number of ratings858 — better—
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple Watch — betteriPhone, Apple Watch
Requires iOS18.0 — better26.0
Further details — not scored
Size172 MB6 MB
Age rating4+4+
DeveloperProactive Life IncMartynas Prascevicius

Customer experience

SleepSpace

All ratings858 ratings
Positive78.7%
Neutral7.1%
Negative14.2%
Written reviews214 reviews
Positive57.0%
Neutral7.9%
Negative35.0%

Combi Fit Track

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

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

Combi Fit Track

Not enough reviews yet to summarise bugs or requests.

In-app purchases

13 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-time3
  • Sage Rader Inceptions$19.99
  • Lifetime SleepSpace Premium$199.99
  • Dave Asprey Lifetime$199.99
None

Combi Fit Track

No in-app purchases

Questions

Is SleepSpace free?
SleepSpace is free to download, with in-app purchases available.
Is Combi Fit Track free?
Combi Fit Track costs $4.99, with no in-app purchases.
Do SleepSpace or Combi Fit Track have ads?
Neither SleepSpace nor Combi Fit Track shows ads.
Which is updated more often, SleepSpace or Combi Fit Track?
SleepSpace ships an update weekly, and Combi Fit Track fortnightly. Most recently, SleepSpace was updated on November 1, 2026 and Combi Fit Track on October 31, 2026.

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