Cardio that asks for what the console shows

31 machines, each with its own input

Most apps know one cardio form: time and calories, done. That works for nothing. A stepmill measures floors and steps per minute, a rower distance and split, a stationary bike resistance and cadence, a treadmill speed and incline.

Athverge models those machines separately, with the fields that are actually on the equipment. You copy what you see instead of translating it into a form that was not made for it — which is why your log can still be compared with itself six months later.

Heart rate zones via Karvonen

Zones based on "220 minus your age" ignore where you started. The Karvonen formula uses your heart rate reserve — the gap between your resting and maximum heart rate — which shifts your zones to where they belong for you.

The fitter you get, the lower your resting heart rate, and the more your zones move with it. Zone 2 stays actually zone 2, instead of slowly turning into something harder without you noticing.

Live heart rate while you train

A Polar H10 pairs over bluetooth directly with your phone and reads along live while you train. You see which zone you are in at the moment it matters, not afterwards.

Alongside that, the Withings, Polar, Google Health and Health Connect integrations pull in your steps, sleep, heart rate and calories burned. All over OAuth, and revocable at any moment.

Outdoors, with a privacy zone around your home

You record an outdoor session with GPS: your route on the map, your splits below it. A privacy zone sits around your home address, so a route does not visibly start or end there.

Location is only used during a session. Nothing runs in the background, and the app only requests the permission for that.

Intervals and the Cooper test

The interval player counts your blocks down so you are not watching a clock. The Cooper test is in there as a fixed measurement: twelve minutes, as far as you can, and a result you can still compare against in six months.