Extremely buggy (especially after updates), and in-app purchases do not seem to sync across all devices (be prepared to uninstall and reinstall multiple times to make in-app purchases sync). No iCloud sync either. Very basic features even in the Pro Pack. Very limited brushes options, color utilization is limited to Copic color swatches and a pointless set of numeral fields. It lacks a real color mixer, color picker, and a color sampler like most drawing programs like sketchPad, Adobe Draw, iDraw etc. bottom line, for the money you could do better with many other options (e.g. iDraw/Graphic by Autodesk) that are more full-featured, user-friendly, definitely less buggy, and let you sync your files across all devices.