I'm using wikicamps at the moment which is pretty good but doubt there are as many places as there is in Camps 6.
I purchased Camps 6 when it came out, spur of the moment thing at a show. Worst investment I have ever made. Take out all the caravan parks and rest areas and there is barely nothing left.
5 minutes on Google is a better option,on this forum ditto , word of mouth on the road even better.
I recently got the wiki camps app and think its great
value for money.
I'll revisit this thread in 12 months as more is added to it. I suspect you will have to sift thru the bullsh!t but looks promising.