This All-Tee app is designed to read height data as recorded by the All-Tee electronic altimeter hardware. The All-Tee altimeter is designed to be used by F1 class Free Flight outdoor competition gliders and complies with the F1 Sporting Code to be used in competitions. All-Tee altimeters are small (19 x 9 x 5 mm), light (0.90 grams) and are packed with functionality such as Bluetooth, push button and signalling leds. All-Tee altimeters can be ordered from [email protected] and are for competitors who hold a valid FAI identification number.