Yes. All apps use some battery power. The effect varies from one phone model to another, but battery consumption is highest when the app uses GPS. If your phone's charge is too low, Ajusto will not start up or will stop collecting data if you're driving, as we don't want to drain your phone's battery recording trips. We are actively working to reduce the effect of the Ajusto section of the app on your battery consumption. Remember to make sure your phone is switched on and the battery is charged so that trip data can be collected.