Comparison

Sleepo vs Interval Flow

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

Head to head
About

Sleepo

Struggling to fall asleep or get restful sleep? This app offers a vast library of calming sounds and white noise options, including nature sounds, rain, fan noise, and brainwave frequencies. Mix and match sounds to create your ideal sleep environment and enjoy features like timers and offline playback.

Highlights
  • Extensive library of sleep sounds and white noise
  • Mix and match sounds for custom ambiance
  • Brainwave frequencies (Isochronic Tones, Solfeggio, Binaural Beats)
  • Sleep, Focus & Nap Timers
  • Save favorite sound mixes
  • Offline mode and background playback
Features
Read full description

Are you having trouble falling asleep at night? Does it hard to get a good night's rest? Meet Sleepo, the ultimate sleep sounds, and white noise app to help you get a better night's rest. With its wide selection of sleep sounds and white noise options, you'll be able to find the perfect combination to help you relax and fall asleep. So download Sleepo today and start getting the rest you deserve! With a wide selection of calming sounds to choose from, you'll be able to find the perfect noise to help you relax and drift off to sleep. From the soothing sounds of rain and thunder to the gentle hum of a fan, Sleepo has something for everyone. In addition to our wide selection of sleep sounds, Sleepo also offers white noise options for those who prefer a more neutral, consistent noise to help them sleep. Whether you choose a traditional white noise sound or one of our unique options, like the sound of a coffee shop or the ocean, you'll be able to find the perfect sound to help you sleep. FEATURES: • Sleep sounds: Soothing sounds and healing music for relaxation, focus, and sleep • Brainwaves: Isochronic Tones, Solfeggio Frequencies and Binaural Beats • White noises: Ocean Waves, Campfire, Heavy Rain, Thunderstorm, Waterfall, and much more • Noise Machine: Mix and match different sounds to create your own perfect ambiance • Sleep, Focus & Nap Timers: Stop the app after a set amount of time • Favorites: Save your favorite mixes to play them later • Mix multiple sounds • Play on launch to immediately start playing your favorite sound • Today Widget with the most recently played sounds • Plays in the background • Offline mode • AirPlay MORE THAN 300 SLEEP SOUNDS & MUSIC: • Nature sounds • Rain sounds • Fan noise • Baby sounds • ASMR sounds • White noise • Water sounds • Brainwaves • Isochronic tones (4hz, 5hz, 10hz, 20hz) • Binaural beats (4hz, 5hz, 10hz, 20hz) • Solfeggio frequencies (396hz, 417hz, 528hz, 741hz, 852hz) And much more… Read more about our terms and conditions here: Terms of service: https://www.apporigins.com/terms-of-use Privacy policy: https://www.apporigins.com/privacy-policy If you have any feedback, don't hesitate to reach out to us at hello@apporigins.com Find your way to a peaceful night's sleep with Sleepo!

About

Interval Flow

This app revolutionizes fitness routines with deep customization and advanced tracking for various activities like HIIT, Yoga, and CrossFit. It allows users to create, share, and follow personalized workouts with features like color-coded intervals, real-time progress tracking, and voice assistance.

Highlights
  • Color-coded intervals
  • Customizable circuits
  • Real-time progress tracking
  • Voice assist and search
  • Exercise library
  • Workout sharing
Features
Read full description

Interval Flow: Experience a Workout Revolution Interval Flow is your ultimate fitness companion, designed to transform your workout experience with deep customization and advanced tracking. This versatile app is perfect for a wide range of activities including HIIT, TABATA, CrossFit, Yoga, Pilates, Meditation, and more. With Interval Flow, you can stay focused on your fitness goals while the app handles the details. Key Features: - Color-Coded Intervals: Customize your workout visually with color-coded intervals. Set distinct colors for warm-ups, high-intensity bursts, rest periods, and more, to easily navigate through your routine. - Exercise Library: Build your workouts with ease! Add new exercises or select from the existing ones to tailor your workout to your specific needs. - Real-Time Progress Tracking: Keep a live tab on your workout progress. The dynamic interval list updates in real-time, ensuring you know exactly where you are in your routine. - Customizable Circuits: Create the perfect workout sequence by arranging various exercises into repeatable circuits tailored to your fitness level and goals. - Personalized Interval Warnings: Get timely alerts before an interval ends. Customize the warning sounds to suit your style, ensuring smooth transitions without missing a beat. - Interactive Workflow: Enjoy crafting your workouts with a user-friendly interface that’s as intuitive as it is functional. Setting up your ideal workout regime is now as engaging as the workout itself. - Voice Assist: Let our advanced voice assist guide you through your exercises, announcing what’s next so you can remain focused on your form and intensity. - Voice Search: Quickly find your favorite workouts using voice commands, making your preparation seamless and hands-free. - AirShare: Share your custom workouts with friends or clients effortlessly using AirDrop, enhancing connectivity and interaction. Why Choose Interval Flow? With Interval Flow, you don't just exercise, you experience a revolution in workout efficiency and enjoyment. The app’s intuitive interface and comprehensive customization options make it the optimal companion for anyone serious about fitness. Whether you're powering through a high-intensity session or seeking tranquility in yoga, Interval Flow adapts to your pace and preference. Unlock your potential with Interval Flow – where your workout meets innovation. Interval Flow Subscription: The app includes a 1 month long auto-renewable subscription with a 3-day free trial, which will unlock premium features, like unlimited workouts, timer program editing and autoplay and costs $4.99/ month. It will be charged to your credit card through your iTunes account and will automatically renew unless you canceled at least 24 hours before the end of the current period. Any unused portion of a free trial period will be forfeited when you purchase the subscription. Though your subscription for the current month cannot be canceled, you can turn auto-renewal off in your account settings after purchase. See the instructions here: https://support.apple.com/en-us/HT202039 You can read the terms of use and privacy policy here: https://kapi90.github.io/hiit_timer_privacy_policy.html End User License Agreement (EULA) of the App Store applies: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Sleepo4 screens
Interval Flow4 screens

Verdict

The call

Sleepo and Interval Flow both sit at 4.7 stars, but that hides the real split: 89% of Sleepo's written reviews are positive against 48% of Interval Flow's. Sleepo also leads on monetization model (free with in-app purchases vs subscription). Interval Flow's advantage is iOS requirement (18.6 vs 26). On price, rating, ratings volume and update cadence 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. Sleepo sells 6 in-app purchases, starting at $1.99 per 7 days and Interval Flow sells 10 in-app purchases, starting at $4.99 per 3 months. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Sleepo against 4.7 for Interval Flow. Both are backed by a comparable volume of ratings — 405 and 167 respectively. Written reviews are what separate them: 89% of Sleepo's written reviews are positive against 48% of Interval Flow's.

UpkeepUpdate frequency

Sleepo ships an update every 2 weeks, Interval Flow fortnightly. Both last shipped on November 3, 2026.

Scorecard3 real differences · 7 level
Sleepo versus Interval Flow: the parameters behind the verdict, then further details
ParameterSleepoInterval Flow
PriceFreeFree
Rating4.7 (405 ratings) — better4.7 (167 ratings)
Positive reviews89.4% of reviews — better48.1% of reviews
Number of ratings405 — better167
Update frequencyEvery 2 weeks — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPadiPhone, iPad
Requires iOS2618.6 — better
Further details — not scored
Size104 MB20 MB
Age rating4+4+
DeveloperAPP ORIGINS STUDIO YAZILIM ANONIM SIRKETIBence Kaposzta

Customer experience

Sleepo

All ratings406 ratings
Positive94.8%
Neutral2.7%
Negative2.5%
Written reviews66 reviews
Positive89.4%
Neutral1.5%
Negative9.1%

Interval Flow

All ratings168 ratings
Positive93.5%
Neutral2.4%
Negative4.2%
Written reviews27 reviews
Positive48.1%
Neutral18.5%
Negative33.3%

User reviews

Sleepo

From 405 App Store ratings

What we love

  • 🌙 Soothing sleep sounds
  • 👍 Easy to use interface
  • 💤 Helps with falling asleep
  • 🎨 Customizable mixes
  • 🧠 Aids concentration and focus

Room to improve

  • 🐛 Broken or non-continuous sounds
  • 💰 Paid features required for full functionality
  • 🔍 Difficulty finding timer/auto-off feature

Interval Flow

From 167 App Store ratings

What we love

  • 👍 Nicely designed with good features
  • 👍 Unique and brilliantly for keeping fit
  • 👍 Simplicity gets it done

Room to improve

  • 🐛 App crashes on launch
  • 🐛 App doesn't remember interval settings
  • 🐛 App rearranges workout order
  • 🐛 Cannot see questionnaire properly
  • 🐛 Robot voice with no visual instructions

Bugs and requests

Sleepo

Reported bugs

3 issues
  • Sounds not playing properly
  • Language issues causing app to malfunction
  • Paid features not working as expected

Requested features

3 requests
  • More free sound options
  • Timer/auto-off feature
  • Preset popular sound mixes

Interval Flow

Reported bugs

10 issues
  • Programs deleted after update
  • App crashes when adding a program
  • Show/Hide Instructions adds time to interval
  • App defaults to unused workout
  • Cannot permanently skip to end of timed activity
Show 5 more
  • Intervals revert to previous settings
  • App won't remember order of custom circuit interval programs
  • Blank screen after download
  • Cannot get program to open
  • Cannot see bottom of screen on questionnaire

Requested features

5 requests
  • Increase repetitions to 20
  • Streamline adding intervals
  • Make it possible to hide unused workouts
  • Add music integration or option
  • Provide visual instructions for moves

In-app purchases

6 purchases

Sleepo

Subscriptions5
  • Sleepo Premium: Sleep Sounds$1.997 Days
  • Sleepo Premium: Sleep Sounds$3.991 Month
  • Sleep Sounds: Sleepo Premium$14.991 Year
Show 2 more
  • Sleepo Premium: Sleep Sounds7 Days trial$19.991 Year
  • Sleepo Premium: Sleep Sounds$19.991 Year
One-time1
  • Sleepo Premium Lifetime$19.99
10 purchases

Interval Flow

Subscriptions8
  • 3 Month$4.993 Months
  • 1 Month$9.991 Month
  • 1 Month, 3 day trial3 Days trial$9.991 Month
Show 5 more
  • Annual7 Days trial$14.991 Year
  • 1 Year discounted$25.951 Year
  • 1 Year, 3 day trial3 Days trial$39.991 Year
  • 1 Year$39.991 Year
  • 1 Year Intro month1 Month trial$39.991 Year
One-time2
  • Free Lifetime subscriptionFree
  • Lifetime$24.99

Questions

Is Sleepo free?
Sleepo is free to download, with in-app purchases available.
Is Interval Flow free?
Interval Flow is free to download, with in-app purchases available.
Which has better reviews, Sleepo or Interval Flow?
Sleepo is rated higher. Sleepo averages 4.7 out of 5 from 405 ratings, while Interval Flow averages 4.7 from 167 ratings.
Do Sleepo or Interval Flow have ads?
Neither Sleepo nor Interval Flow shows ads.
Which is updated more often, Sleepo or Interval Flow?
Sleepo ships an update every 2 weeks, and Interval Flow fortnightly. Most recently, Sleepo was updated on November 3, 2026 and Interval Flow on November 3, 2026.

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