Tempo's engine is written from the ground up for high accuracy and stability. It keeps going even in device lock mode, making it a useful aid for live drumming. On the iPhone, Tempo features an innovative interface that morphs between five modes: Basic, Preset, Setlist, Practice and Gig. Each mode presents a different combination of functionalities optimized for the task at hand. On the iPad, the interface takes advantage of the additional display space by making available all controls at all time.