Jesse Jost has announced the release of Arpist 1.4, which waives the In-App Purchase for Advanced Features ($5.99 US).
Advanced Features provides access to features like MIDI Clock send/receive, MIDI Remote Control for real time control of the arpeggiator from a MIDI controller, Key Transpose, Scales and Preset Management.
Arpist was first released in 2013, designed for use with MIDI hardware instruments, iOS instrument apps and DAWs, combining a fully-featured, programmable arpeggiator with song sequencing and musical transposition features.