Thanks Lee. Been playing with Camera ZOOM FX for a couple of days - definitely the one to go for!
A really good selection of photo FX - they are all pretty quick and the quality seems better than on FXCamera which has some kind of distortion pattern on most pictures.
Its a shame Camera ZOOM FX doesn't have the manual focus button though, but maybe they'll add it, but it does have loads of features like zoom (obviously), geotagging, auto-save, so its a pretty amazing app overall!
FXCamera is still good for a free app, so I'd recommend that if you just want basic effects.