Comparison

IntervalTimer(x) vs SleepLoop

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

Head to head
About

IntervalTimer(x)

This app provides a customizable interval timer for workouts, focus sessions, and breaks. It offers audio cues, visual progress, and tracks workout history locally. Optional body metrics can be entered for calorie estimates, all stored securely on your device.

Highlights
  • Customizable work/rest/sets intervals
  • Audio cues for transitions
  • Workout history log
  • Local calorie estimates
  • Offline functionality
  • Siri Shortcuts integration
Features
Read full description

IntervalTimer - Train On Your Terms IntervalTimer is a clean, customizable interval timer built for workouts, focus sessions, and recovery breaks. Set your work duration, rest duration, and number of sets , then let the app keep you on pace with audio cues and a visual progress indicator. Your data stays on your device. IntervalTimer collects no personal data and has no account system. Everything - your workout history, body metrics, timer configurations, and intentions - is stored locally using Apple's SwiftData framework. Nothing leaves your phone. There are no servers, no cloud sync, no analytics pipelines, and no third-party SDKs tracking your behavior. The optional body metrics (weight, height, sex) you enter for calorie estimates are saved only in your device's local storage via UserDefaults. They are never transmitted, never shared, and never used for any purpose beyond the in-app calorie calculation you see on screen. Features: - Fully customizable work/rest/sets intervals - Audio cues for transitions and completion - Workout history log with session details - Calorie estimates based on your local profile - Intentions tracking to reflect on your mindset - Pre-configured templates to get started fast - Siri Shortcuts and Spotlight integration - Works entirely offline - always Disclaimer: Calorie estimates are educational only and not a substitute for medical advice.Consult a healthcare provider before making health decisions.

About

SleepLoop

This app offers a variety of ambient sounds, including brown, pink, green, and white noise, along with over 100 nature sounds like rain and ocean waves. It aims to improve sleep, focus, and anxiety relief through its minimalist design and seamless background playback.

Highlights
  • Brown, pink, green, white noise
  • 100+ nature and rain sounds
  • Minimalist vinyl record interface
  • Seamless background playback
  • Ad-free experience
  • Focus and anxiety relief
Features
Read full description

Discover the profound power of brown noise! Sleeploop offers professional brown, pink, green, and white noise, along with 100+ high-quality rain and natural sounds. The low-frequency characteristics of brown noise effectively block out distractions, promote deep sleep, and enhance focus. Unique vinyl record interface, one-touch playback, minimalist and elegant. Why choose brown noise? Brown noise is deeper and warmer than white noise. Its low-frequency energy is stronger, like a distant waterfall or deep thunder, making it particularly suitable for: • Deep sleep - more effectively masking sudden noises (door slamming, talking) • Enhanced focus - research shows it's especially effective for ADHD users • Anxiety relief - low-frequency sounds soothe the nervous system • Tinnitus relief - low frequencies better mask tinnitus problems Why choose Sleeploop? • 4 professional colored noises: Offers brown, pink, green, and classic white noise. • Minimalist Vinyl Aesthetics: A unique vinyl record interface allows you to watch the record spin and immerse yourself in a pure world of sound. • 100+ Curated Sound Libraries: A rich selection of natural ambient sounds, including rain, ocean waves, streams, campfires, and wind. • Seamless Background Playback: Continue playing even when the screen is locked; easily switch tracks. • Ad-Free and Clean: A premium experience with zero interruptions. Focused on your health and well-being. Complete Sound Library 【4 Colored Noises】 • Brown Noise - Deep and warm, ideal for deep sleep and focus • Pink Noise - Gentle and balanced, suitable for relaxation and soothing babies to sleep • Green Noise - Natural and soothing, suitable for meditation and reading • White Noise - Classic choice, suitable for all scenarios 【Rich Natural Sounds】 • Rain Sounds: Rain in a tent, raindrops on a car roof, drizzle outside a window, thunderstorm night, forest rain • Water Sounds: Waves crashing on the shore, babbling brook, roaring waterfall, dripping water • Natural Environments: Crackling campfire, wind blowing through the trees, frogs croaking at night, birdsong in the forest • Comfortable Environments: Whispers in a café, fan turning, clock ticking, cat purring Suitable for • Insomnia sufferers: The deep frequencies of brown noise can more effectively block out environmental noise, helping you fall asleep quickly. • For those with ADHD and attention deficit: Scientific research confirms that brown noise can significantly improve concentration. • For those experiencing anxiety and stress: Low-frequency sounds can soothe the nervous system and help the brain relax. • For students and working professionals: Concentrate on work or study in noisy environments, or quickly de-stress and relax. • For meditation and yoga practitioners: Green noise and natural sounds provide the perfect background for practice. • For new parents: Pink and brown noise can effectively soothe babies and are gentler than white noise. • For tinnitus sufferers: The low-frequency characteristics of brown noise better mask tinnitus. Scientific Basis for Brown Noise • Sleep Quality: Studies show that low-frequency sounds can increase the proportion of deep sleep. • Improved Concentration: Particularly effective for those with ADHD. • Frequency Characteristics: Brown noise has the strongest low-frequency energy and is closer to the sounds of nature. • Masking Effect: Better at masking sudden noises than white noise. Download Sleeploop now and experience the profound power of brown noise. Let professional colored noise and natural sounds guide you into deeper sleep, a more focused state, and a calmer state of mind. Terms of Service: https://noisesleep.com/Terms Privacy Policy: https://noisesleep.com/Privacy

Screenshots

IntervalTimer(x)4 screens
SleepLoop4 screens

Verdict

The call

The clearest difference is in-app purchases: IntervalTimer(x) at none against SleepLoop's 3. SleepLoop's advantage is ratings volume (13 vs 1). On price, rating, update cadence and ads 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. SleepLoop sells 3 in-app purchases, starting at $1.99 per month. IntervalTimer(x) asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for IntervalTimer(x) against 5.0 for SleepLoop. That said, the two scores are not equally well evidenced: SleepLoop has 13 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

IntervalTimer(x) ships an update every 3 weeks, SleepLoop every 10 days. The most recent releases landed on July 6, 2026 and September 19, 2026 respectively.

Scorecard3 real differences · 7 level
IntervalTimer(x) versus SleepLoop: the parameters behind the verdict, then further details
ParameterIntervalTimer(x)SleepLoop
PriceFreeFree
Rating5.0 (1 ratings)5.0 (13 ratings)
Positive reviews75.0% of reviews
Number of ratings113 — better
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhoneiPhone, iPad — better
Requires iOS18.117.6 — better
Further details — not scored
Size9 MB13 MB
Age rating4+4+
DeveloperShapeHaven Innovations LLCWD Studio

In-app purchases

None

IntervalTimer(x)

No in-app purchases

3 purchases

SleepLoop

Subscriptions2
  • Premium Monthly $1.99$1.991 Month
  • Premium Annual $19.99$8.991 Year
One-time1
  • SleepLoop Premium Lifetime$39.99

Questions

Is IntervalTimer(x) free?
IntervalTimer(x) is free to download, with no in-app purchases.
Is SleepLoop free?
SleepLoop is free to download, with in-app purchases available.
Which has better reviews, IntervalTimer(x) or SleepLoop?
IntervalTimer(x) and SleepLoop are both rated 5.0 out of 5 on the App Store, from 1 and 13 ratings respectively.
Do IntervalTimer(x) or SleepLoop have ads?
Neither IntervalTimer(x) nor SleepLoop shows ads.
Which is updated more often, IntervalTimer(x) or SleepLoop?
IntervalTimer(x) ships an update every 3 weeks, and SleepLoop every 10 days. Most recently, IntervalTimer(x) was updated on July 6, 2026 and SleepLoop on September 19, 2026.

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