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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+ €1.799+ more than €800 more than €6.000
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 18 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 EN 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 kanalen 1 channel single-site 6 kanalen
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
Waterdicht 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.