I tested the Amazfit Balance 3 for swimming HR accuracy alongside the FORM Smart Swim 2…
Category: Courses
hDrop sweat sensor calibration: why fluid loss runs high
Three sessions, the same error direction. A controlled HYROX gym test produced a 37 percent overestimate…
Amazfit Balance 3 cycling Accuracy – how not test test – Dartmoor Classic
The Amazfit Balance 3 delivered near-chest-strap HR accuracy over 108 km in 26°C heat at the…
Fitbit AIR vs watchOS 27: HR and HRV Accuracy Tested
watchOS 27 records HRV for just 4 minutes per hour. Fitbit AIR locks on late and…
Fitbit Air vs Whoop MG in HYROX Accuracy Test
Five devices, one HYROX simulation, and a post-gym pub trip. Fitbit Air produced the widest error…
Amazfit Cheetah 2 Ultra – Is The GPS Accurate or Not?
The Amazfit Cheetah 2 Ultra scores 85% on a standardised 10-mile GPS accuracy test — better…
After a 150 minute ride with Fitbit Air, Whoop and an ECG Strap here’s what I found
A 150-minute Z2 endurance ride with Frontier ZONE, Whoop MG, Fitbit Air, and Amazfit Helio Strap…
Fitbit Air Lost My data – I Want It Back
Fitbit Air lost my open water swim data for hours. The fix is to record swims…
Google Health: Fitbit, We have a problem. A design problem.
A $99 screenless tracker has exposed the weak spots in Google's new Fitbit app. Google Health…
Fitbit Air – We Got A Problem – Cadence Lock
Fitbit Air produced cadence-locked HR during an indoor treadmill interval session, averaging ~157 bpm against a…
Fitbit Air vs Amazfit Cheetah 2 Ultra: Bike Sprint HR Test
The Amazfit Cheetah 2 Ultra returns ±3 bpm limits of agreement in a road bike sprint…
Amazfit Cheetah 2 Ultra: HR Accuracy in a HYROX Sim – plus SmO2 Sensor
The Amazfit Cheetah 2 Ultra was put through a HYROX simulation in a gym at 33°C.…
FORM Smart Swim 2 LT: Open Water SwimStraight Test
FORM's SwimStraight compass is meant to keep you swimming in a straight line without constant sighting.…
