# STUnlocker Ride vs VO2 Max Tracker

The clearest difference is in-app purchases: STUnlocker Ride at none against VO2 Max Tracker's 6. STUnlocker Ride also leads on ratings volume (19 vs 1). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. VO2 Max Tracker sells 6 in-app purchases, starting at $4.99 per 7 days. STUnlocker Ride asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.1 for STUnlocker Ride against 4.0 for VO2 Max Tracker. That said, the two scores are not equally well evidenced: STUnlocker Ride has 19 ratings behind it against 1, so its average is the more settled of the two.

STUnlocker Ride ships an update every 10 days, VO2 Max Tracker weekly. The most recent releases landed on September 22, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | STUnlocker Ride | VO2 Max Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (19 ratings)](https://appshunter.io/ios/app/stunlocker-ride/id1555083755/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/vo2-max-tracker-zephyrus/id6450862734/reviews) |
| Number of ratings | **19** | 1 |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | **Free** | Freemium |
| Size | 67 MB | 14 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Vadim Bukin](https://appshunter.io/developer/1470219022) | [Havard Tryman](https://appshunter.io/developer/1662964293) |

## What reviewers say

### STUnlocker Ride

[App page](https://appshunter.io/ios/app/stunlocker-ride/id1555083755)

Track your Shimano STEPS E-bike rides with this app. It records speed, cadence, battery, and GPS data, and supports external heart rate monitors. Analyze your sessions and export them to popular fitness platforms.

**Highlights:** Records E-bike ride sessions, Displays speed, cadence, assist level, battery, Supports external HRM sensors, Analyzes recorded sessions, Exports to GPX and FIT formats, Integrates with Strava and Apple Health

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### VO2 Max Tracker

[App page](https://appshunter.io/ios/app/vo2-max-tracker-zephyrus/id6450862734)

Measure your cardio fitness (VO₂ max) using a treadmill test and track your progress. Create or select from pre-made HIIT workouts, with real-time guidance on target zones. Integrates with Apple Watch and Bluetooth heart rate monitors.

**Highlights:** VO₂ max testing on treadmills, HIIT workout creation and selection, Real-time target zone guidance, Apple Watch and heart rate monitor integration, Workout history with heart rate graphs, iCloud data synchronization

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro (Weekly) | $4.99 | per 7 days |
| Pro (Monthly) | $7.99 | per month |
| Pro | $8.99 | per 7 days |
| Pro | $24.99 | per year |
| Pro (Yearly) | $24.99 | per year |
| Pro (Yearly) | $59.99 | per year |


## Frequently asked questions

### Is STUnlocker Ride free?

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

### Is VO2 Max Tracker free?

VO2 Max Tracker is free to download, with in-app purchases available.

### Which has better reviews, STUnlocker Ride or VO2 Max Tracker?

STUnlocker Ride is rated higher. STUnlocker Ride averages 4.1 out of 5 from 19 ratings, while VO2 Max Tracker averages 4.0 from 1 ratings.

### Do STUnlocker Ride or VO2 Max Tracker have ads?

Neither STUnlocker Ride nor VO2 Max Tracker shows ads.

### Which is updated more often, STUnlocker Ride or VO2 Max Tracker?

STUnlocker Ride ships an update every 10 days, and VO2 Max Tracker weekly. Most recently, STUnlocker Ride was updated on September 22, 2026 and VO2 Max Tracker on September 26, 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.*