App works with Shimano E-Bike motors via Bluetooth. Allows: - Get E-bike information (total distance, battery health and etc) - Change assist settings - Change gearing type (mechanical, electrical) and chainrings size - Change light settings - Presets for quick setups of your bike - Other features depending on your bikes firmware Warning: the new EP801 and EP6 motors do not support changing advance settings (region, circumference). All other motors with the latest firmware do not support changing advanced settings via Bluetooth.