If you use your phone in your car, TomTom do a
free app that I've been satisfied with so far...
https://play.google.com/store/apps/details?id=com.tomtom.speedcams.android.map
I don't know if there's an Apple/iOS equivalent
Forgot to add, benefits include
- don't have to remember to update a database
- will run 'over the top' of a stanav or other app like Google Maps, Waze, Spotify...
- can be configured not to warn you unless you're actually approaching a camera above it's speed limit (knows the speed limit)
- can warn you when you're over the speed limit regardless of cameras - good should you want to change your speeding behaviour
It's not 100% (but what its?)
- I've noticed a few of the speed limits (not the cameras, so far) are wrong
- You prob need to be using/powering your phone in your car already (for music/satnav etc), though it will work off the phone's battery
- It DOES use data, but not a lot (depending on the mode you use it in)
- Doesn't seem to audibly alert if I speed over the limit only between the app's trigger distance and the actual camera (i.e. accelerating), though the popup always appears. (I choose no audio alterts unless I'm over the speed limit)