They also have an international version called Windy Maps (Mapy.cz has some Czech-centric features): https://play.google.com/store/apps/details?id=cz.seznam.wind...

Thanks for the tip. The map style is very dense but IMHO the best for urban areas.

Some names are only rendered in Czech, and hill shading seems to be available only with an active internet connection. I still prefer the shading of "Bergfex Touren" for mountain sports.

Absolutely. I’m actually Czech, so they’re my no. 1 choice anyway, but I’m currently on vacation in Italy and the maps are still great and very useful.