Comparison

Spatial Sleep vs KB Fit

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

Head to head
About

Spatial Sleep

This science-backed app uses acoustic resonance harmonies, paired with a wearable headband, to help users fall asleep faster, stay asleep longer, and wake up refreshed. It offers drug-free, non-invasive sleep support and includes post-sleep breathwork and brain teaser games.

Highlights
  • Acoustic resonance harmonies for sleep
  • Wearable headband integration
  • Clinically proven sleep improvement
  • Drug-free and non-invasive
  • Personalized harmonies via machine learning
  • Post-sleep breathwork exercises
  • Brain teaser games for alertness
Features
Read full description

Sleep better, wake sharper — naturally. Discover Spatial Sleep: the science-backed app clinically proven to help you fall asleep faster, stay asleep longer, and wake up feeling refreshed. Pair with our innovative wearable headband to play gentle acoustic resonance harmonies that gently guide your brain into deep, restorative sleep. Created by a dream team of Stanford University Medical School physicians and technology industry leaders, Spatial Sleep is safe to use, drug-free, and non-invasive. Our innovation utilizes machine learning technology to compose acoustic resonance harmonies tailored to your unique physiology. In clinical studies, participants who used the band nightly over 4 weeks saw the strongest results with insomnia severity dropping by up to 50%. No meds. No side effects. Just better nights and brighter mornings. Download Spatial Sleep and experience sleep — reimagined. Please consult your doctor before making any medical decisions. Any feedback? Contact us at hello@spatialsleep.com Additional information including the privacy policy, biometric notice and terms of use can be found at https://spatialsleep.com

About

KB Fit

This app offers personalized workout and meal plans to help you achieve your fitness goals. Track your progress, log meals, and connect with your coach for real-time support and video sessions. It integrates with health kits for comprehensive data analysis.

Highlights
  • Personalized workout plans
  • Customized meal plans
  • Nutrition, hydration, and habit tracking
  • 1-on-1 chat with coach
  • Video call sessions with coach
  • Progress tracking and analytics
  • Wearable device integration
Features
Read full description

Kick-start your fitness journey with KB Fit. Together with Kelsey Barnes, you'll have the best combination of nutrition & exercises available on a single app. With KB Fit, you can begin your fitness journey in no time. Get a fully personalized workout and meal plan tailored to your fitness goals. Progress tracking gets easier when you log your daily workout, record meals, update your check-ins and connect your fitness band & health kit, and get real-time updates via advanced analytical tools. Everything that contributes to your fitness goals gets captured in one place. To top it all, use the inbuilt 1-1 chat feature to have all your queries addressed on the go. You deserve to be the best. That’s why KB Fit have packed so many features in a single app to help you achieve your fitness goals. Start your journey today! Features that will help you achieve your fitness goals include: * Personalized Workout Plan: Get a fully personalized fitness plan tailored to your goals, whether it is to gain weight, lose weight, gain muscles, or simply wish to work on your general fitness. * Nutrition, Hydration & Habits: Access meal plans assigned by your coach and log your food intake to keep a close track of your calorie intake and macros. You can also track your hydration, steps and calories burnt on the app. * Instant messaging & video calls - Message your coach in real-time and schedule video sessions directly from the app. Stay connected with your coach to improve compliance and get better results. * Check-ins: Gain complete insight into your overall performance with easy check-ins and real-time updates. * Progress: Stay on top of your progress with powerful analytics. * Wearable integration: Get the bigger picture of your progress by connecting your fitness band & health kit thereby enabling real-time updates. Note regarding Apple Health: The app integrates with Apple Health to show your daily activity - distance, steps, active energy, and flights to help you better achieve your goals. App also uses Apple Health to track energy burned and heart rate during a workout session, if an Apple Watch is used. Workout metrics are shared with the coach to better design your workout schedule. DISCLAIMER: Users should seek a doctor’s advice before using this app and making any medical decisions.

Screenshots

Spatial Sleep4 screens
KB Fit4 screens

Verdict

The call

The clearest difference is review sentiment: KB Fit at 100% against Spatial Sleep's 0%. KB Fit also leads on update cadence (every 3 weeks vs every 5 months) and rating (5.0 vs 4.6). Spatial Sleep's advantage is ratings volume (11 vs 1). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

KB Fit holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Spatial Sleep has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Spatial Sleep's written reviews are positive against 100% of KB Fit's.

UpkeepUpdate frequency

Spatial Sleep ships an update every 5 months, KB Fit every 3 weeks. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
Spatial Sleep versus KB Fit: the parameters behind the verdict, then further details
ParameterSpatial SleepKB Fit
PriceFreeFree
Rating4.6 (11 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings11 — better1
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.615.0 — better
Further details — not scored
Size181 MB132 MB
Age rating4+17+
DeveloperSound Health Systems, Inc.Kelsey Barnes

Customer experience

Spatial Sleep

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

KB Fit

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Spatial Sleep

No in-app purchases

None

KB Fit

No in-app purchases

Questions

Is Spatial Sleep free?
Spatial Sleep is free to download, with no in-app purchases.
Is KB Fit free?
KB Fit is free to download, with no in-app purchases.
Which has better reviews, Spatial Sleep or KB Fit?
KB Fit is rated higher. Spatial Sleep averages 4.6 out of 5 from 11 ratings, while KB Fit averages 5.0 from 1 ratings.
Do Spatial Sleep or KB Fit have ads?
Neither Spatial Sleep nor KB Fit shows ads.
Which is updated more often, Spatial Sleep or KB Fit?
Spatial Sleep ships an update every 5 months, and KB Fit every 3 weeks. Most recently, Spatial Sleep was updated on November 7, 2026 and KB Fit on November 4, 2026.

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