I have been using this for over a year now and find it to be spot on. Having just changed phones I emailed CamerAlert in the evening to change my details and the following morning it had been done. An excellent product with excellent back up.
CBRonda, iPhone
Latest version even better than before.
I use this in conjunction with TomTom app on my iPhone 4. I turn off the TomTom camera alerts and rely on this better source of information.
New version allows you to launch a SatNav app in parallel to CamerAlert which saves a finger press. As I’m lazy that’s a great feature for me.
Database seems very accurate and is updated reliably even alerting you that you are out of date.