The ACTYVO Cycling & Challenges app actually consumes low energy. However, there are some factors that help to ensure that little battery is consumed on the smartphone while riding.
On the one hand, you should close unnecessary applications that are open in parallel on the smartphone.
If the app is always in the foreground (open and visible on the screen), then the consumption is higher due to the performance of the display on the screen than if the app only runs in background mode (open, but not on the screen).
All necessary features of the app, such as tracking (route tracking) and audio announcements, of course also work in background mode.