# Sleep Brain vs HIIT

The clearest difference is rating: HIIT at 4.3 against Sleep Brain's 3.5. HIIT also leads on ads (none vs shown) and ratings volume (34 vs 11). Sleep Brain's advantage is review sentiment (91% vs 57%) and iOS requirement (13.0 vs 17.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Sleep Brain sells 17 in-app purchases, starting at $6.90 per 7 days and HIIT sells 8 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

HIIT holds the better App Store score, 4.3 against 3.5. Both are backed by a comparable volume of ratings — 11 and 34 respectively. Written reviews complicate that: 91% of Sleep Brain's written reviews are positive against 57% of HIIT's, so the app with the better star average is not the one people write more warmly about.

Sleep Brain ships an update every 11 days, HIIT every 2 weeks. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Sleep Brain | HIIT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (11 ratings)](https://appshunter.io/ios/app/sleep-brain-sleep-tracker/id1640403934/reviews) | **[4.3 (34 ratings)](https://appshunter.io/ios/app/hiit-simple-interval-timer/id6449472984/reviews)** |
| Number of ratings | 11 | **34** |
| Positive reviews | **90.9% of reviews** | 57.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 11 days** | Every 2 weeks |
| Monetization | Freemium | Free with in-app purchases |
| Size | 235 MB | 83 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Huanxiu Technology (Shanghai) Co., Ltd.](https://appshunter.io/developer/1595991644) | [Maxim Kazakov](https://appshunter.io/developer/1290266003) |

## What reviewers say

### Sleep Brain

[App page](https://appshunter.io/ios/app/sleep-brain-sleep-tracker/id1640403934)

This app helps you improve sleep quality and reduce stress through advanced tracking, tailored meditation programs, and soothing sounds. It provides detailed reports on your sleep patterns and offers insights into achieving better rest and overall well-being.

**Highlights:** Comprehensive sleep tracking, Tailored meditation programs, Stress relief with soothing sounds, Detailed sleep reports, Mindfulness and calm philosophy guidance

**Features:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $6.90 | per 7 days |
| Monthly_Premium_8.99 | $8.99 | per month |
| Monthly Premium | $8.99 | per month |
| Monthly | $8.99 | per month |
| Weekly Premium | $9.99 | per 7 days |
| Monthly | $9.99 | per month |
| Monthly | $9.99 | per month |
| Monthly_Premium | $19.99 | per month |
| Quarterly | $19.99 | per 3 months |
| Six Months | $29.99 | per 6 months |
| Yearly | $49.99 | per year |
| Yearly | $49.99 | per year |
| Yearly | $89.99 | per year |
| One Week | $0.99 | one-time |
| One Month | $9.99 | one-time |
| Six Months | $29.99 | one-time |
| One Year | $49.99 | one-time |


### HIIT

[App page](https://appshunter.io/ios/app/hiit-simple-interval-timer/id6449472984)

Design and track custom interval running workouts with real-time data and audio cues. This app offers detailed post-run analysis and integrates with Apple Health and Apple Watch for phone-free training.

**Highlights:** Customizable intervals (time, distance, open), Support for HIIT, tempo, fartlek, pyramid, progression workouts, Real-time tracking of pace, cadence, heart rate, Audio cues for guidance, Phone-free Apple Watch operation, Post-run analysis and GPX export, Apple Health integration

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Day 2 | $0.99 | per month |
| Premium Weekly | $3.99 | per 7 days |
| Premium Monthly Day 1 | $4.99 | per month |
| Premium Monthly | $9.99 | per month |
| Premium 3 Months | $19.99 | per 3 months |
| Premium Annual Special Offer | $29.99 | per year |
| Interval Run Premium Yearly | $59.99 | per year |
| Intreval Run Premium Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Sleep Brain free?

Sleep Brain is free to download, with in-app purchases available.

### Is HIIT free?

HIIT is free to download, with in-app purchases available.

### Which has better reviews, Sleep Brain or HIIT?

HIIT is rated higher. Sleep Brain averages 3.5 out of 5 from 11 ratings, while HIIT averages 4.3 from 34 ratings.

### Do Sleep Brain or HIIT have ads?

Sleep Brain shows ads; HIIT does not.

### Which is updated more often, Sleep Brain or HIIT?

Sleep Brain ships an update every 11 days, and HIIT every 2 weeks. Most recently, Sleep Brain was updated on October 2, 2026 and HIIT on October 6, 2026.

---

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