I had CamerAlert on my previous 3GS and it was brilliant then upgraded to 4S and had problems but the folks at CamerAlert support were brilliant and sorted it out for me; it just took some details and 30mins and then up and working perfectly. The app is fantastic but what’s even better is the support that you get when there’s a problem. 5 star Service.
Intuitive, reliable and regularly updated (if you pay yrly subscription). Interface allows you to quickly upload new cameras, which I did on a 2000 mile tour of France. Back a week and they have confirmed ‘free’ lifetime membership. This app provides a better interface and is more informative than any other speed camera database I have used. Recommend it – best bargain available.