# XOSS vs HIIT Workout

The clearest difference is in-app purchases: XOSS at none against HIIT Workout's 2. XOSS also leads on ads (none vs shown) and ratings volume (395 vs 8). HIIT Workout's advantage is rating (4.8 vs 4.4) and device support (3 vs 1). On price, review sentiment and update cadence there is nothing between them.

Both are free to download. HIIT Workout sells 2 in-app purchases, starting at $0.99 per month. XOSS asks for nothing beyond the download.

HIIT Workout holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: XOSS has 395 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 52% of XOSS's written reviews are positive against 60% of HIIT Workout's.

XOSS ships an update every 6 weeks, HIIT Workout every 3 months. The most recent releases landed on October 19, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | XOSS | HIIT Workout |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (395 ratings)](https://appshunter.io/ios/app/xoss-train-with-science/id1267749721/reviews) | **[4.8 (8 ratings)](https://appshunter.io/ios/app/hiit-workout-interval-timer/id1664899160/reviews)** |
| Number of ratings | **395** | 8 |
| Positive reviews | 52.2% of reviews | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 110 MB | 114 MB |
| Requires iOS | 18 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [XOSS HONG KONG CO., LIMITED](https://appshunter.io/developer/1530144728) | [SHPAVDA, TOO](https://appshunter.io/developer/1779139180) |

## What reviewers say

### XOSS

[App page](https://appshunter.io/ios/app/xoss-train-with-science/id1267749721)

Record and analyze your outdoor sports activities with detailed metrics like speed, cadence, and heart rate. Plan routes, sync data from various bike computers, and share your progress with friends. Offers advanced data analysis with charts and GPS tracking.

**Highlights:** Syncs with bike computers, Records workout data, Advanced data analysis, GPS tracking on map, Route planning, Syncs with Strava/TrainingPeaks

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Clean and simple interface
- 🚀 Reliable data tracking
- 💡 Useful 3D route visualization
- 🤝 Seamless Strava integration
- 💰 Good value for money

**What reviewers complain about**

- 🐛 Inconsistent GPS connectivity
- 🔄 Sync issues with Strava
- 🔍 Limited data analytics
- 🌐 Lack of language options (e.g. French, Russian)
- 🔋 Battery drain concerns

**Reported bugs**

- App crashes after recent updates
- Unable to update device firmware on iOS
- Sensor connectivity problems
- Incorrect distance/speed measurements

**Requested features**

- Add more detailed metrics (e.g. elevation, power)
- Improve route editing and privacy controls
- Introduce automatic sync options
- Provide more comprehensive data export capabilities


### HIIT Workout

[App page](https://appshunter.io/ios/app/hiit-workout-interval-timer/id1664899160)

This adaptable timer app helps you customize sports and fitness routines, from HIIT to yoga. It also supports productivity by allowing timed work intervals, like the Pomodoro technique. Enjoy a clutter-free interface with customizable sound and themes.

**Highlights:** Customizable workout intervals, Preparation and rest time settings, Save custom timers, Sound on/off option, Light and dark themes, Multiple language support, Minimalistic design

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Ad-Free | $0.99 | per month |
| Yearly Ad-Free | $9.99 | per year |


## Frequently asked questions

### Is XOSS free?

XOSS is free to download, with no in-app purchases.

### Is HIIT Workout free?

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

### Which has better reviews, XOSS or HIIT Workout?

HIIT Workout is rated higher. XOSS averages 4.4 out of 5 from 395 ratings, while HIIT Workout averages 4.8 from 8 ratings.

### Do XOSS or HIIT Workout have ads?

HIIT Workout shows ads; XOSS does not.

### Which is updated more often, XOSS or HIIT Workout?

XOSS ships an update every 6 weeks, and HIIT Workout every 3 months. Most recently, XOSS was updated on October 19, 2026 and HIIT Workout on October 16, 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.*