accurate, it's perfectly good enough. Meanwhile, iHandy Carpenter packs a ruler, spirit level, protractor and plumb line into a slick, pretty app. 10. Shop Sure, you can buy stuff on Apple's App Store and iTunes Store -- the latter being even more compelling now most music is DRM-free and can be downloaded over the cell network -- but that's just the start! Amazon's iPhone-optimised store (go to www.amazon.co.uk with Safari on your iPhone) -- is great. As long as you have a mobile signal, you can shop! By submitting this form you agree to our Terms of Use and so are legally responsible for anything you submit. DO NOT submit anything which may violate the Terms of Use or another person\'s rights including copyrighted or offensive materials.