VO2 Master Manager vs Train.Red APP
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VO2 Master Manager
This tool collects and displays performance data including VO2, heart rate, and power. It also monitors speed, cadence, and muscle oxygenation for comprehensive analysis.
- VO2 monitoring
- Heart rate tracking
- Power data collection
- Speed and cadence monitoring
- Muscle oxygenation data
- Performance analysis
Read full descriptionHide full description
VO2 Master Manager is a data display, collection, and analysis tool. It monitors your performance through VO2, heart rate, and power, speed, cadence, and Moxy muscle oxygenation data collection.
Train.Red APP
This app monitors muscle oxygen saturation to provide real-time physiological insights for athletes and coaches. It helps optimize performance, track recovery, and analyze training data with actionable metrics.
- Muscle oxygen saturation monitoring
- Real-time physiological insights
- Performance and recovery tracking
- Workout analysis and data export
- Team/organization structure
- Live data overlay
Read full descriptionHide full description
About this app The official app for the Train.Red muscle oxygen sensors, the new metric for performance. To move, your muscles need energy. The most efficient way to get this energy requires oxygen. We measure the oxygen saturation in your muscles to help you improve. Not every athlete has a team of scientists helping them with their physiological data, we measure data from your muscle and translate this into useable insights, in real-time. - Monitor your physiological power and perform easy exercise tests as an endurance athlete. - Know when your muscle is fully recovered and ready for the next set when doing strength. What’s more? - Cloud functionality to allow workout analysis at home, even when you perform in the gym. - A Team/organisation structure that allows multiple athletes to use the sensors. - Actionable insights after your training or scientific analysis with access to raw data. - Live view with data overlay to match measured fatigue with movement patterns. - Muscle States, Protocols, Dashboard, Training Menu, Muscle Stress Score, and much more. How to start with Train.Red: Create a user profile and connect your sensor. No sensors yet? The Train.Red app requires the Train.Red sensors for full functionality (https://train.red/). Connected your FYER or PLUS? Nice, you are ready to BE AHEAD. What does Train.Red do for me: Whether you’re an athlete, coach, scientist, physio, or anyone involved in sport, Train.Red has something to offer you. Simply because your muscles play a key role in human movement. We track your muscle oxygenation, more specifically, the hemoglobin concentration changes. The Train.Red sensors measure: - SmO2, Muscle Oxygen Saturation (%) - O2Hb, Oxyhemoglobin (mM) - Hhb, Deoxyhemoglobin (mM) - Thb, Total hemoglobin (mM) - HbDiff, the Hemoglobin Difference (mM) If this sounds like Abracadabra, no worries. We display the oxygen saturation in your muscle live and use the other metrics to provide you with actionable insights in real-time. Our AI and advanced analysis options translate this data into 5 different muscle states showing you if your muscle is recovering, or approaching its limits. If this physiological data sounds familiar, perfect. We allow exporting your data to .csv or .fit files for an in-depth analysis of all your data. Every single training session is stored in our cloud and can be analyzed or exported afterward. How do I use Train.Red? The Train.Red sensor is a light-based wearable that you wear directly on your skin. You’re free to place the sensor anywhere on your body but know that this is a hyperlocal metric that will only tell you something about the exact location you place the sensor. We recommend wearing the sensor on a primary involved locomotor muscle, a place on your body that is active during the activity you’re performing. e.g. on your thigh during cycling or squats, the middle part of your upper leg during running, or on your lower arm during climbing. Of course, you are free to use more than one sensor! You can connect up to 4 sensors simultaneously and measure multiple areas at once. You’re not bound to this smartphone application. The Train.Red hardware is integrated into 3rd party apps allowing you to easily synchronise your data from multiple sources. Train.Red sensors can be connected to most Wahoo’s, Garmin’s, Suunto’s and several other devices. More information can be found on our website https://train.red/
Screenshots
Verdict
The clearest difference is rating: Train.Red APP at 5.0 against VO2 Master Manager's 4.0. VO2 Master Manager's advantage is ratings volume (9 vs 1). On price, update cadence, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Train.Red APP holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: VO2 Master Manager has 9 ratings behind it against 1, so its average is the more settled of the two.
VO2 Master Manager ships an update every 5 weeks, Train.Red APP every 4 weeks. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.
| Parameter | VO2 Master Manager | Train.Red APP |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (9 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 9 — better | 1 |
| Update frequency | Every 5 weeks | Every 4 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 87 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | VO2 MASTER HEALTH SENSORS INC | Train.Red B.V. |
Customer experience
VO2 Master Manager
Train.Red APP
In-app purchases
VO2 Master Manager
No in-app purchases
Train.Red APP
No in-app purchases
Questions
Is VO2 Master Manager free?
Is Train.Red APP free?
Which has better reviews, VO2 Master Manager or Train.Red APP?
Do VO2 Master Manager or Train.Red APP have ads?
Which is updated more often, VO2 Master Manager or Train.Red APP?
Other comparisons















