The Ultimate Circle of Fifths App

 Today's app is the Ultimate Circle of Fifths app:

Ultimate Circle of Fifths (https://ultimate-circle-of-fifths.com) Songwriting and practice tool; pick chords out of the circle of fifths; create custom chords which are out of the key; change time signature (4/4, 3/4, 6/8, 7/8, 5/8); change tempo (40-320bpm); adjust the flexible song structure; once song is composed can change the key to find the right one; continuously growing list of popular songs; check out what popular songs look like in the circle of fifths; practice and analyze them and see directly which chords are off key; Piano & Guitar fretboard; check out how chords and scales are played on the piano or guitar; check out melodies or practice scales on the go with the interactive keyboard; share and collaborate; share song links with friends, teacher, or band colleagues; receivers (iOS only) can open and work on them in their app; export songs as MIDI files and work with them in any digital audio workstation; save favorite compositions on device; work on them later, share, or export them as MIDI; highlights the key in the “Songwriting” mode; can also display the traditional circle of fifths with the parallel minor chords in the “Scale” mode; practice scales of different modes in any key including Ionian (major), Aeolian (minor), Dorian, Phrygian, Lydian, Mixolydian, Locrian, and more than 80 additional scales with the optional “Scales Pack”; practice in different clefs including G clef, F clef, and C clef; display chords, roman numerals, or both; playback sounds include Grand Piano, Acoustic Guitar, E-Piano, and Synth Pad; practice or compose with or without a click; adjust volume levels individually; transpose playback for Bb or Eb instruments; four color themes including a color blind theme; display minor chords in small letters; display 4-note-chords; display German note names (B will be H); chord symbols and chord structures are explained; no registration account needed; (iOS 11.0 or later).