Workout+

The Karoo 3 workout layout, on your Karoo 2.

A free extension that takes over the Karoo 2's workout page while a workout runs: the target bar, a big interval countdown with beeps and the interval graph, your CORE heat data and the fields you choose. Your other ride pages stay as they are.

Download the APK View the source

Version 1.2.0. Open source, Apache 2.0. Built on Hammerhead's official extension API, no system changes.

What you see on the bike

Every picture here is drawn by the extension's own code on each build, at the Karoo 2's 480 × 800 pixels, using the Karoo's own font.

0:54:289:01
The Workout+ workout page

Reading the target

The same colors as the Karoo 3. The box slides along the bar: the middle third is your target range. Single-value targets get the Karoo's own band, ±5 % for power and ±7.5 % for heart rate.

248

In range. Hold it there.

231

Below the range: push a little harder.

266

Above the range: ease off.

What's new

1.2.0 · Screen flash

The screen flashes with the beeps: an amber frame at 10 s and at 5-4-3-2-1, green as the next interval starts. On other ride pages the chip flashes instead. Turn it off with Flash the screen with the beeps.

1.1.0 · Beeps, recap and summary

Countdown beeps with a pulsing interval bar, an 8 s recap of each finished interval in the graph area, a per-interval table when the workout is done, and optional off-target beeps.

Set it up

You need a computer with adb and USB debugging turned on on the Karoo (Hammerhead's guide).

  1. Download the APK

    Get karoo-workout-plus.apk from the latest release.

  2. Install it and let it draw over the ride app

    adb install -r karoo-workout-plus.apk
adb shell appops set com.angkyria.karooworkout SYSTEM_ALERT_WINDOW allow

    Or open Workout+ on the Karoo and tap Grant.

  3. Ride a workout

    Start a ride with a workout loaded. Workout+ covers the workout page by itself. To try it at your desk first, turn on demo mode in its settings.

Good to know

Your buttons stay yours

Workout+ never takes the hardware buttons. Page changes, lap and back work as always, and a swipe changes the page underneath.

Beeps you can count on

A double beep 10 s before an interval ends, then 5-4-3-2-1 and a long beep as the next one starts, and the screen flashes with each. Turn on off-target beeps to hear when you've been under or over the target for 15 s. All in the Alerts settings.

Choose your fields

Four slots: power, heart rate, cadence, lap and time data, core temperature and more. Set any of them to None to give the rest more room.

Power from your sensor

Your power, heart rate or cadence come from the Karoo's workout data, or straight from the sensor when the workout data has none.

CORE heat

With a CORE sensor, core temperature, heat strain and skin temperature show in the heat-zone colors. The heat strain comes from the CORE Heat extension.

Pause and skip stay on the Karoo

The extension API can't pause or skip a workout, so those stay on the Karoo's own controls. Workout+ shows the result, and PAUSED while the ride is paused.

Intervals as you ride them

The Karoo shares the running interval only, so the graph fills in as you ride. What's still to come is hatched.