I started these doodles sitting on the 243 bus commuting home on an iPhone 4. I came across an article in a mag that talked about finger painting on iPhones. I became fascinated with digital art created on mobile devices. I then went through just about every app on the AppStore trying to find one that fitted me.
I found the app that suited my needs and that was Sketchbook that eventually taken over by Autodesk through a number of free and payware versions. I just liked the menu system.
I now work on an 10.5” iPad Pro with Pencil and it has improved my drawings no end from the finger smudging efforts those years ago.