The iHealth Edge is an activity and sleep tracker that can switch between four different modes, tracking steps and distances, calories burned and sleep efficiency. A fun activity level feature motivates the user to be more active and therefore reach higher levels. It can be wirelessly connected to a mobile device via Bluetooth 4.0 and stores up to 14 days of data. Powered by a rechargeable built-in battery, it typically lasts for five to seven days between charges.