What sensor is best for me?

Auf dieser Seite können Sie unsere Sensoren vergleichen, um sicherzustellen, dass Sie die richtige Wahl treffen!

Do you ship internationally?

Yes, we do! We ship from the Netherlands, shipping cost depends on your location. We offer free shipping within Europe*. For businesses and all other countries, costs are calculated automatically on the website.

How long will it take to get my order?

Das hängt davon ab, wo Sie sich befinden. Bei Bestellungen, die hier bearbeitet werden, dauert es ein paar Werktage, bis sie ankommen. Lieferungen nach Übersee können zwischen 2 und 14 Tagen dauern. Einzelheiten zur Lieferung erhalten Sie in Ihrer Bestätigungs-E-Mail.

What if the app crash after calibration?

If the app crashes after the 10-second calibration, it may be due to GPS not being enabled on your phone. GPS access is required for the app to function properly. Solution: 1. Ensure GPS is enabled on your phone before starting a session. 2. When prompted for location permissions, grant access to the app. 3. If the issue persists, manually enable GPS for the Train.Red app in your phone’s settings.

Why can't connect my sensor via Bluetooth?

If you've followed the recommended troubleshooting steps and your sensor still won't connect, check if other Bluetooth devices are interfering with the connection. One common issue occurs with smartwatches. If a smartwatch is charging, it may automatically keep the sensor connected, even in standby mode, preventing your phone from establishing a connection. Solution: 1. Try disconnecting the charging cable from your smartwatch. 2. If the issue persists, enable Airplane Mode on the smartwatch. This will prevent it from interfering with the Bluetooth connection. 3. Once the smartwatch is in Airplane Mode, try reconnecting your sensor to the phone. This should resolve the issue and allow your sensor to connect properly. If you continue to experience problems, please contact our support team.

Same insight,
none of the compromise.

Sensor comparison	FYER 2.0 Enthusiasts, athletes, coaches & education	FYER PRO New Enthusiasts, athletes, coaches, labs & education	PLUS 2.0 Coaches, exercise labs & education	Other brand Sports Sensor Coaches, exercise labs	Other brand Lab Sensor Research labs
Value & ownership
Price range	€699+	€999+	€1.999+	Between FYER and FYER PRO	~3x the price of PLUS
Free app, iOS & Android	✔ Yes	✔ Yes	✔ Yes	✖ Nopaid companion app	✖ Nono app, Windows software
3rd-party platform integrations	✔ Yes	✔ Yes	✔ Yes	✔ Yes	✖ No
Athlete, coaching & team platform
Team & athlete management	✔ Yes unlimited profiles	✔ Yes unlimited profiles	✔ Yes unlimited profiles	✖ Nono team layer	✖ Nono team layer
Coach feedback on sessions	✔ Yes	✔ Yes	✔ Yes	✖ No	✖ No
Cloud sync & storage	✔ Yes	✔ Yes	✔ Yes	✖ No	✖ Nodesktop-only
Standardised test library	✔ Yes 26 built-in tests	✔ Yes 26 built-in tests	✔ Yes 26 built-in tests	✖ No	✖ No
3rd-party sensor data (HR, power, speed, cadence)	✔ Yes Garmin, Wahoo, Whoop, Amazfit, Suunto & more	✔ Yes Garmin, Wahoo, Whoop, Amazfit, Suunto & more	✔ Yes Garmin, Wahoo, Whoop, Amazfit, Suunto & more	✖ No	✖ No
Performance & connectivity
Sample speed	10 Hz	up to 100 Hz	100 Hz fastest in its class	2 Hz only 10 Hz in fast mode	100 Hz
Battery life	up to 20 hrs	up to 20 hrs	up to 12 hrs	1–6 hrs	up to 6 hrs at 100 Hz
Multi-device connection	✔ Yes 10+ per phone	✔ Yes 10+ per phone	✔ Yes 10+ per phone	✔ Yes	✔ Yes via desktop software
BLE UND ANT+	✔ Yes both	✔ Yes both	✔ Yes both	✔ Yes both	✖ NoBluetooth only
IMU (motion sensor)	✔ Yes included no 100 Hz export	✔ Yes included 100 Hz	✔ Yes included 100 Hz	✖ No	optional add-on
Data that tells you what to do next
Real-time data
SmO₂% / TSI%	✔ Yes	✔ Yes	✔ Yes	✔ Yes	✔ Yes
O2Hb	✖ No	✔ Yes	✔ Yes	✖ No	✔ Yes
HHb	✖ No	✔ Yes	✔ Yes	✖ No	✔ Yes
tHb	✖ No	✔ Yes	✔ Yes	✔ Yes	✔ Yes
HbDiff	✖ No	✔ Yes	✔ Yes	✖ No	✖ No
Athlete / coach data layer
Muscle States	✔ Yes	✔ Yes	✔ Yes	✖ No	✖ No
MSS	✔ Yes	✔ Yes	✔ Yes	✖ No	✖ No
Recovery phase	✔ Yes	✔ Yes	✔ Yes	✖ No	✖ No
Fuel/Use ratio	✔ Yes	✔ Yes	✔ Yes	✖ No	✖ No
Trend	✔ Yes	✔ Yes	✔ Yes	✔ Yes	✖ No
Post-session data	SmO₂, O2Hb, HHb, tHb + Muscle States, MSS, Recovery phases, Fuel/Use ratio, Trend	SmO₂, O2Hb, HHb, tHb + Muscle States, MSS, Recovery phases, Fuel/Use ratio, Trend	SmO₂, O2Hb, HHb, tHb + Muscle States, MSS, Recovery phases, Fuel/Use ratio, Trend	SmO₂ and THb only raw values, no coaching layer	O2Hb, HHb, tHb, TSI raw values, no coaching layer
Sensor design	1 channel (64 micro-channels) — optimised for all-day wearability	1 channel (64 micro-channels) — optimised for all-day wearability	6 Kanäle	1 channel single-site	6 Kanäle
Measuring depth (interoptode distance)	~12.5–17.5 mm 25–35 mm interoptode distance	~12.5–17.5 mm 25–35 mm interoptode distance	~5–20 mm 10–40 mm interoptode distance, 6 channels	~12.5 mm 25 mm interoptode distance	~5–20 mm 10–40 mm interoptode distance, 6 channels
Export data	CSV, FIT & auto Report	CSV, FIT & auto Report	CSV, FIT & auto Report	FIT via 3rd-party tools	Via proprietary desktop software
Built for the body, not the bench
Gewicht	20 g lightest in class	20 g lightest in class	26 g	~48 g	26 g
Wasserdicht	✔ Yes IPX7	✔ Yes IPX7	✖ No IPX4 (sweatproof)	✔ Yes	✖ No sweatproof
USB-C	✔ Yes	✔ Yes	✔ Yes	✖ Nomicro-USB	✔ Yes
Offline storage on sensor	✔ Yes 1000+ hrs	✔ Yes 1000+ hrs	✔ Yes 1000+ hrs	✔ Yes	✔ Yes 100+ hrs
Prices are starting prices ex. VAT and accessories, based on publicly listed pricing at time of writing for the single-channel sports sensor, and quote-based indicative pricing for the 6-channel lab system. Specifications sourced from official manufacturer documentation. Train.Red B.V. is an independent manufacturer and is not affiliated with either third-party product referenced above.

FYER, FYER PRO and PLUS all ship ready to train: unbox, pair with the free app, and get real-time muscle oxygen coaching in under five minutes — no lab software, no separate purchase for motion tracking.

Same insight,none of the compromise.

Same insight,
none of the compromise.