# Sleepo vs Interval Flow

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.

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.

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.

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

## The numbers

| Metric | Sleepo | Interval Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (405 ratings)](https://appshunter.io/ios/app/sleepo-sleep-sounds/id1661414064/reviews)** | [4.7 (167 ratings)](https://appshunter.io/ios/app/interval-flow-wod-timer/id6444124987/reviews) |
| Number of ratings | **405** | 167 |
| Positive reviews | **89.4% of reviews** | 48.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 104 MB | 20 MB |
| Requires iOS | 26 | **18.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [APP ORIGINS STUDIO YAZILIM ANONIM SIRKETI](https://appshunter.io/developer/1631694922) | [Bence Kaposzta](https://appshunter.io/developer/1650069302) |

## What reviewers say

### Sleepo

[App page](https://appshunter.io/ios/app/sleepo-sleep-sounds/id1661414064)

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:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sleepo Premium: Sleep Sounds | $1.99 | per 7 days |
| Sleepo Premium: Sleep Sounds | $3.99 | per month |
| Sleep Sounds: Sleepo Premium | $14.99 | per year |
| Sleepo Premium: Sleep Sounds | $19.99 | per year |
| Sleepo Premium: Sleep Sounds | $19.99 | per year |
| Sleepo Premium Lifetime | $19.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**Requested features**

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


### Interval Flow

[App page](https://appshunter.io/ios/app/interval-flow-wod-timer/id6444124987)

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:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Month | $4.99 | per 3 months |
| 1 Month | $9.99 | per month |
| 1 Month, 3 day trial | $9.99 | per month |
| Annual | $14.99 | per year |
| 1 Year discounted | $25.95 | per year |
| 1 Year, 3 day trial | $39.99 | per year |
| 1 Year | $39.99 | per year |
| 1 Year Intro month | $39.99 | per year |
| Free Lifetime subscription | Free | one-time |
| Lifetime | $24.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

- 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

**Requested features**

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


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*