Brushing time is set to 2 minutes by default. However, your dentist may advise you to brush your teeth longer, depending on your dental needs.
Your brushing time can be modified by going to the Duration option in the game settings. Use the arrows to increase or decrease the brushing time.
The brushing time that you set in the game is automatically applied to the profile concerned in the Kolibree app, on condition that an internet connection is able to transmit the data. Similarly, the brushing time set for a profile by the Kolibree app is automatically applied in the Rabbids Smart Brush game.