Ipad painting

Trying out one of my 16 painting apps in the search for a great colour mixer. Best colour mixer is Infinite Painter on my android phone. It will hopefully come to ipad in the coming year. For this painting i used artstudio and its smudge tool which really distorts rather than mixes. Perhaps i need to fine tune. Each art app has pluses and minus, some are better for watercolour, others pastels or oils etc.