Recommendations for iPhone nomad

So just noticed nomad is on iPhone. Curious to try it when commuting, sitting around. But my fat fingers make using it real hard.

Anyone use it?, if so what workflow works best for you?.

Is there a pen/pencil that can work on iPhone? ( that isn’t the fat rubber ones or the plastic disk ones), maybe a Bluetooth keypad for shortcuts?.

Maybe an onscreen macro app. So you can assign commands to a macro button to help the clutter in UI?.