Comparison

SleepSpace vs AquaFaste

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

AquaFaste

Features
Read full description

How much water did you really drink today? AquaFaste answers that question — with a personal Hydration Score that rates your day from 0 to 100. Track every sip with one tap. AquaFaste calculates your daily goal based on your weight and activity level using EFSA guidelines, then helps you hit it every single day. ▸ PERSONAL HYDRATION SCORE Your Hydration Score rates your daily performance from 0 to 100 — based on consistency, timing, and goal completion. No other app does this. Track your score over time and watch it climb. ▸ ONE-TAP TRACKING • 12 drink types — water, coffee, tea, juice, milk, smoothie, and more • Personal daily goal — calculated from your weight and activity level • Live progress ring — beautiful animated ring fills as you drink • Caffeine monitoring — track your caffeine intake alongside hydration • HealthKit sync — your water data flows into Apple Health automatically ▸ INSIGHTS & HISTORY • Weekly & monthly charts — see hydration trends at a glance • Daily timeline — every drink logged with timestamp and amount • Smart statistics — daily average, best day, goal rate, and streaks • 30-day calendar — visualize consistency with a color-coded heat map ▸ STREAKS & ACHIEVEMENTS Build daily streaks and unlock 12 achievements across four categories: Streak, Volume, Variety, and Consistency. From "Hydration Starter" (3 days) to "Century Club" (100 days). ▸ SMART REMINDERS Context-aware notifications during waking hours. Quiet at night. Streak-at-risk alerts keep you on track. Goal celebration when you hit your target. ▸ SHARE YOUR STATS Generate beautiful hydration cards with your progress ring, stats, and streak — perfect for Instagram, TikTok, or friends who need a hydration nudge. ▸ PRIVACY FIRST All data stays on your device. No accounts. No cloud. No ads. Ever. ▸ SIRI & SHORTCUTS "Hey Siri, log water" — hands-free hydration tracking. ▸ FREE TO USE Core tracking is free, forever. Upgrade to Pro for unlimited history, advanced stats, smart reminders, all themes, CSV export, streak freeze, caffeine insights, and custom drinks. Terms of Use: https://theknack2020-sketch.github.io/aquafaste/terms Privacy Policy: https://theknack2020-sketch.github.io/aquafaste/privacy

Screenshots

SleepSpace4 screens
AquaFaste4 screens

Verdict

The call

SleepSpace and AquaFaste 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. SleepSpace sells 10 in-app purchases, starting at $6.99 per month and AquaFaste sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
SleepSpace versus AquaFaste: the parameters behind the verdict, then further details
ParameterSleepSpaceAquaFaste
PriceFreeFree
Rating4.2 (858 ratings) — better—
Positive reviews57.0% of reviews—
Number of ratings858 — better—
Update frequencyWeekly—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS18.017.0 — better
Further details — not scored
Size172 MB8 MB
Age rating4+4+
DeveloperProactive Life IncUFUK OZDEMIR

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

AquaFaste

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

SleepSpace

Subscriptions8
  • Legacy Dave Asprey Monthly1 Month trial$6.991 Month
  • Premium Monthly Subscription1 Year trial$12.991 Month
  • Premium Monthly Subscription1 Month trial$12.991 Month
Show 5 more
  • Premium Monthly Subscription7 Days trial$12.991 Month
  • 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
  • Sage Rader Inceptions$19.99
  • Lifetime SleepSpace Premium$199.99
3 purchases

AquaFaste

Subscriptions2
  • Monthly Premium$1.991 Month
  • Yearly Premium7 Days trial$9.991 Year
One-time1
  • Lifetime Premium$4.89

Questions

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

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