Ultra Sharp

Turn your finger into a tiny blade as you swipe and cut objects in this physics-based puzzler.

The aim of the game is to cut large shapes at the perfect spot so they fall apart and take out stars dotted around the screen.

Ultra Sharp looks and sounds incredibly simple but it can leave you tearing your hair out – making it perfect for killing time on the commute.

It’s the tricky but hugely popular sequel to the smash hit Super Sharp and it’s already soaring through the App Store charts since its release a few weeks ago.

If you lack patience, YouTube is packed with cheat videos showing you how to progress through the levels.

Or you can pay to unlock the ‘skip’ button which will let you jump tough levels.

But that would completely defeat the object of playing – so don’t you dare!