The Air Pen­cil from Adtile lets any­one cap­ture free­form move­ment in space using their mobile device. Air Pen­cil taps into a smartphone’s nat­ive micro-elec­tro-mech­an­ic­al sys­tems (MEMS) – namely the three-axis mag­ne­to­met­er, three-axis accel­er­o­met­er and three-axis gyro­scope. It then calls on soph­ist­ic­ated Adtile-designed algorithms to reli­ably infer the pre­cise move­ments of the user based on sensor data.