E vs VO2 Max Tracker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
E
Track outdoor exercises with GPS and connect to compatible treadmills via Bluetooth. Record workout history, share fitness data, and enjoy intelligent treadmill features.
- GPS tracking for outdoor exercises
- Treadmill compatibility via Bluetooth
- Workout history tracking
- Fitness data recording
- Intelligent treadmill features
- Fitness data sharing
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E-Running is an integrated fitness APP with a fully featured GPS tracking service for outdoor exercises. Compatible with numerous brands of treadmills, E-Running can help track your workout history and record your statistics. Enjoy the fun of the next level treadmill intelligence! Record and share your fitness data while on the treadmill ! To sync with a treadmill, E-Running must be supported by Bluetooth BLE4.0 on iOS devices. The use of this software requires iPhone4S or better. Note: Continued use of GPS running in the background can dramatically decrease battery life.
VO2 Max Tracker
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.
- 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
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Use Zephyrus to test your cardio fitness (VO₂ max) on a treadmill, and track your improvement. You can also use Zephyrus to do HIIT workouts. The app comes with a selection of workouts, and lets you create your own workouts. Zephyrus tells you when the target zone changes. To get your heart rate in the app, you can use Apple Watch or heart rate monitors with Bluetooth. Garmin watches with Virtual Run are supported. Cardio fitness is measured with a modified Bruce protocol test you can perform on most treadmills. The test consists of stages with increasing intensity and ends when you reach 85% of maximum heart rate. You can do HIIT workouts on Apple Watch, so you don't have to bring your phone. Your past workouts are saved to your workout history, where you can see the heart rate graph and calories burned. Your data is stored in iCloud, which makes it accessible across your Apple devices. Always consult with a healthcare provider before starting any new exercise program. Exercise can carry risks, especially for people who have certain medical conditions or who have not been physically active in a long time. It's important to understand that using this app does not replace a doctor's advice or treatment. If you would like to report an issue or request a feature for the app, feel free to contact the App Support email. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: E at none against VO2 Max Tracker's 6. E also leads on iOS requirement (7.0 vs 18.6). VO2 Max Tracker's advantage is update cadence (every 2 weeks vs monthly). On price, rating, ratings volume 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
Both are free to download. VO2 Max Tracker sells 6 in-app purchases, starting at $4.99 per 7 days. E asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.0 for E against 4.0 for VO2 Max Tracker. Both are backed by a comparable volume of ratings — 2 and 1 respectively.
E ships an update monthly, VO2 Max Tracker every 2 weeks. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.
| Parameter | E | VO2 Max Tracker |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (2 ratings) | 4.0 (1 ratings) |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 2 — better | 1 |
| Update frequency | Monthly | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 7.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 12 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Fitshow (Xiamen) Infomation Technology Co., Ltd. | Havard Tryman |
Customer experience
E
VO2 Max Tracker
In-app purchases
E
No in-app purchases
VO2 Max Tracker
- Pro (Weekly)7 Days trial$4.997 Days
- Pro (Monthly)3 Days trial$7.991 Month
- Pro3 Days trial$8.997 Days
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- Pro$24.991 Year
- Pro (Yearly)3 Days trial$24.991 Year
- Pro (Yearly)$59.991 Year









