To activate voice navigation in the Decathlon Outdoor app, go to the start of the route you choose to navigate and start it. Then, click on the icon represented by a loudspeaker to the right of screen to activate (active loudspeaker icon) or deactivate (muted loudspeaker icon) voice navigation.
Once the voice navigation is activated, you can make the most of audio directions when on route. Sounds, such as bells, will signal points of interest (POI) along your itinerary.
It is also worth knowing that the POIs are adapted to your pace. For example, if you are on a bike, the POI will be set off earlier than on foot to let you follow the route appropriately.
Also, make sure the audio on your phone is activated to hear the Decathlon Outdoor app's voice navigation.