Comparison

Train.Red APP vs AiroQur

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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 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/

About

AiroQur

Features
Read full description

AiroQur is an advanced respiratory training system built to help users strengthen and coordinate their breathing muscles through structured, data-driven sessions. Developed from the same technology platform as Airofit, AiroQur focuses on precision, consistency, and ease of use in both guided and self-paced training environments. By combining hardware resistance control with intelligent software feedback, AiroQur makes respiratory muscle training measurable, trackable, and adaptable to each individual’s progress. The app guides users through targeted inspiratory and expiratory exercises that support improved breathing efficiency, endurance, and control. AiroQur is a regulated medical device intended for use under the supervision of healthcare professionals. It should not replace consultation with a qualified physician. Always seek a doctor’s advice before making any medical decisions. AiroQur is not a toy. This product is designed for breathing exercises only. Any other use is not recommended. This product is not intended to diagnose, treat, cure, or prevent any disease.

Screenshots

Train.Red APP4 screens
AiroQur4 screens

Verdict

The call

The clearest difference is update cadence: AiroQur at every 10 days against Train.Red APP's every 3 weeks. Train.Red APP's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Train.Red APP ships an update every 3 weeks, AiroQur every 10 days. The most recent releases landed on July 30, 2026 and September 20, 2026 respectively.

Scorecard2 real differences · 7 level
Train.Red APP versus AiroQur: the parameters behind the verdict, then further details
ParameterTrain.Red APPAiroQur
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeksEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size101 MB57 MB
Age rating4++12
DeveloperTrain.Red B.V.Airofit A/S

In-app purchases

None

Train.Red APP

No in-app purchases

None

AiroQur

No in-app purchases

Questions

Is Train.Red APP free?
Train.Red APP is free to download, with no in-app purchases.
Is AiroQur free?
AiroQur is free to download, with no in-app purchases.
Do Train.Red APP or AiroQur have ads?
Neither Train.Red APP nor AiroQur shows ads.
Which is updated more often, Train.Red APP or AiroQur?
Train.Red APP ships an update every 3 weeks, and AiroQur every 10 days. Most recently, Train.Red APP was updated on July 30, 2026 and AiroQur on September 20, 2026.

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