Synth from Retronyms is a superb synthesiser app for the iPad. It's one of the very first apps that we show to iPad objectors - just try replicating that on your £199 netbook! Our only grumble is that Synth is missing a few key features that make it an essential purchase. A recent update has gone someway towards bridging the gap between fun and essential.

Version 2 new offers a Pitch-Bend wheel, and an in-app purchased upgrade path that provides much deeper control over the sounds of the instruments, in fact you can pretty much create your own instruments from scratch.

We'd like to see Retronyms add basic recording features before we wholeheartedly recommend the in-app upgraded version, but it's a great little app even in its current incarnation.