Comparison

Train.Red APP vs Studio T23

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

Studio T23

Features
Read full description

Let op: je hebt een Studio T23-account nodig om in te loggen in deze app. Werk aan je gezondheid en fitness op een manier die bij je past met de Studio T23-app. Of je nu je conditie wilt verbeteren, gewicht wilt verliezen of sterker wilt worden – deze app helpt je om je doelen te behalen en gemotiveerd te blijven. Belangrijkste functie: - Voeding bijhouden: Houd je dagelijkse calorie- en voedingsinname eenvoudig in de gaten. - Trainingsschema’s & workouts: Bekijk je trainingsgeschiedenis, volg persoonlijke schema’s en ontdek kant-en-klare workouts. - Voortgang bijhouden: Volg je gewicht, afmetingen en voortgangsfoto’s om te zien hoe je vooruitgaat. - Coach-chat: Stel vragen en ontvang snel professionele begeleiding van je persoonlijke coach. - Online check-up: Vul je check-up in en krijg direct inzicht in je gezondheid en voortgang. Met de Studio T23-app heb je altijd en overal toegang tot de ondersteuning die je nodig hebt. Begin vandaag nog met een actieve en gezonde levensstijl en ervaar hoe eenvoudig het is om gemotiveerd te blijven. Technische info De app van Studio T23 is ontwikkeld met FITsociety Software (www.fitsociety.io).

Screenshots

Train.Red APP4 screens
Studio T234 screens

Verdict

The call

The clearest difference is update cadence: Studio T23 at every 9 days against Train.Red APP's every 4 weeks. Train.Red APP's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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 4 weeks, Studio T23 every 9 days. The most recent releases landed on October 3, 2026 and October 17, 2026 respectively.

Scorecard2 real differences · 7 level
Train.Red APP versus Studio T23: the parameters behind the verdict, then further details
ParameterTrain.Red APPStudio T23
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 4 weeksEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size100 MB100 MB
Age rating4+4+
DeveloperTrain.Red B.V.FITsociety BV (Apps)

In-app purchases

None

Train.Red APP

No in-app purchases

None

Studio T23

No in-app purchases

Questions

Is Train.Red APP free?
Train.Red APP is free to download, with no in-app purchases.
Is Studio T23 free?
Studio T23 is free to download, with no in-app purchases.
Do Train.Red APP or Studio T23 have ads?
Neither Train.Red APP nor Studio T23 shows ads.
Which is updated more often, Train.Red APP or Studio T23?
Train.Red APP ships an update every 4 weeks, and Studio T23 every 9 days. Most recently, Train.Red APP was updated on October 3, 2026 and Studio T23 on October 17, 2026.

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