An oral hygiene device operable to provide guidance to an individual based on cleaning performance, the oral hygiene device comprising: a handle portion comprising a power drive system ; an inter-oral assembly ; a motion sensor ; and a processor operable for: determining an initial position of the inter-oral assembly in response to the inter-oral assembly being moved to a first location within a mouth of the individual based on motion sensing data obtained from the motion sensor ; providing a first indication for moving the inter-oral assembly to a first segment within the mouth; determining , based on a cleaning guidance outputted from a guidance generator , and an orientation estimation , the orientation estimation being based on an output of the motion sensor , in response to the inter-oral assembly being moved to the first segment, that the inter-oral assembly is located within a first sub-segment of the mouth, wherein the first segment comprises the first sub-segment; determining a first level of compliance within the first segment based on cleaning by the inter-oral assembly within the first sub-segment; and providing feedback based on the cleaning within the first sub-segment. a handle portion comprising a power drive system ; an inter-oral assembly ; a motion sensor ; and a processor operable for: determining an initial position of the inter-oral assembly in response to the inter-oral assembly being moved to a first location within a mouth of the individual based on motion sensing data obtained from the motion sensor ; providing a first indication for moving the inter-oral assembly to a first segment within the mouth; determining , based on a cleaning guidance outputted from a guidance generator , and an orientation estimation , the orientation estimation being based on an output of the motion sensor , in response to the inter-oral assembly being moved to the first segment, that the inter-oral assembly is located within a first sub-segment of the mouth, wherein the first segment comprises the first sub-segment; determining a first level of compliance within the first segment based on cleaning by the inter-oral assembly within the first sub-segment; and providing feedback based on the cleaning within the first sub-segment. determining an initial position of the inter-oral assembly in response to the inter-oral assembly being moved to a first location within a mouth of the individual based on motion sensing data obtained from the motion sensor ; providing a first indication for moving the inter-oral assembly to a first segment within the mouth; determining , based on a cleaning guidance outputted from a guidance generator , and an orientation estimation , the orientation estimation being based on an output of the motion sensor , in response to the inter-oral assembly being moved to the first segment, that the inter-oral assembly is located within a first sub-segment of the mouth, wherein the first segment comprises the first sub-segment; determining a first level of compliance within the first segment based on cleaning by the inter-oral assembly within the first sub-segment; and providing feedback based on the cleaning within the first sub-segment. <EOS>