●Sketchbook

Fancy yourself as an artist, but can’t even draw a straight line? Sketchbook is on hand to unleash your inner doodler by way of a mammoth selection of brushes and pencils that you can select before attacking a digital canvas. You also get handy tools like symmetry mirrors and perspective grids that make it look like you know what you’re doing. It’s pro-grade – but even pros don’t have to pay for it. £free / Android, IOS