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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 Y 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 canales 1 channel single-site 6 canales
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
Peso 20 g lightest in class 20 g lightest in class 26 g ~48 g 26 g
Impermeable 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.