Company MDECKS MUSIC, LLC created these great apps:
Mapping Tonal Harmony Pro, Mapping Tonal Harmony L1, Mapping Tonal Harmony Pro, mDecks Ear Training 1 : Intervals, Triads & Sevenths, mDecks Ear Training 1 Free, Kids Ear Training, mDecks Ear Training 1, 60 Hot Guitar Licks Vol.1, Rhythmic Vocabulary For All Instruments : Fundamental Studies, myFinder, Master Piano Grooves, 60 Top Hat Piano Grooves Vol. 1 FREE, 60 Top Hat Guitar Licks Vol. 1 Part 1, Rhythmic Vocabulary for All Instruments Vol. 1, Saxophone Tricks of the Trade, Music Theory Puzzles 1, Christmas Puzzles by mDecks Music, Christmas Rhythmic Trainer, How to Play Flute by Mario Cerra Vol. 1, How to Play Flute Complete, How to Play Saxophone by Mario Cerra, Sounds of Christmas Free by mDecks Music, Sounds of Halloween by mDecks Music, Bach Rhythmic Studies, Mozart Rhythmic Studies, Music Theory Puzzles 2, Tessitura Pro, Tessitura Pro, Politonus I (Ear Training), See Music (Sight-Reading), See Music Pro (sight-reading), Politonus II (Ear Training), Politonus II Ear Training, Politonus III (Ear Training), Politonus III Ear Training, and others..