Motorhome Parking App

Hi, wondered if anyone had ever downloaded one and been satisfied with it? I've just tried and downloaded one from the App Store but it doesn't seem to have a lot of info on it. 

I'm thinking of one with places to park in the day when visiting somewhere and overnight  stays - not sites (cc and the like) but more pull ins etc  

I'm also only interested in UK at moment and it would be good to know if there's one out there that's recommended

thanks in advance