Back to topic
In the UK, I use PGPSW database on the phone. You can either overlay it within the TomTom app or use the dedicated speed camera app.
Had a snooper once and the database was out of date all the time. My thoughts would be the smaller and cheaper the system, the less care in maintaining (and checking) the database. If a set of SPECS go up it takes probably less than a week for the database on PGPSW to be updated.
Why do the road atlases all show that database ?
Phone picks up GPS fine when propped at front of centre console, I've got a Breffo spider there but have recently fitted another Breffo into the vent duct for the drivers window. Holds the phone perfectly and all I had to do was run an power extension under the steering wheel.
The PGPSW database in certainly the best and most up-to-date one around. As I don't own a smartphone I use my small TomTom ONE to run the database. It provides both visual and an audible beep warning and I can set the distance from the camera that the beep occurs related to the speed giving me plenty of time to slow down without any sharp braking. Mounted at the right-hand end of the screen it works well as a Sat/Nav and I can enter locations easily with a touch screen keyboard with my right-hand.. It's hard wired so comes on whenever the ignition is turned on and there is only a short lead visible from the door trim rubber to the unit.