I've had the free satnav version for years and loved it .
That's no longer available and it had become the second choice to Park4Night for us.
The smart phone app just seems to the same as the others. Its the same price and P4N is really all we use now.
I've renewed mine, but probably for the last time. The desktop version is not good. I use SearchforSites and park4night much more can CamperContact. Having said that the desktop version of park4nights is also poor.