This app was mentioned in 5 comments, with an average of 1.40 upvotes
wait, that are the guys from Telenav who did this app: https://play.google.com/store/apps/details?id=com.skobbler.forevermapng it didn't receive an update since 2015. And they launched a new app (that's not available in Germany?). It is (was?) a German company... And I paid around 10$ for that app.
Telenav Inc. and Telenav GmbH are the devs; is that the same company?
Try Scout. Offline maps are not free, a city is $1.12, a country is $3.38, continent is $5.64, and World is $11.30. But it's much more streamlined than OsmAnd, it has 3D, and so on.
OsmAnd has an incredible amount of features for the advanced user which makes the average Joe give up fast. For example, you can have offline renderings like this.
I've been using Scout. Like google maps but works offline.