Haven't contacted any at this stage - thanks for the tip though, I'll definitely look at doing that in future. I guess with this app I was just so focussed on the development side of things, and getting the whole process working that I didn't spend much time marketing the app itself.

Does anyone have a recommendation for some good app review websites? I've seen a few spammy ones around, just wondering if there's one or two sites people actually find useful?