Just look trumpets handles on a trumpet in B on the android phone and assign. This application is used to Tonsuche by handles, to handle search for notes and to handle search for tones. It can be chosen in the options between attacks on a Bb trumpet in Bb or in C. Also, the display of the complete fingering chart is possible. This application allows to use the site http://link.tillmenke.de/trpgr (trumpet handles) without internet access on an Android smartphone.