score:5
The one comparable to the Heathrow one you mentioned can be found here:
https://www.frankfurt-airport.com/en/flights---more/transfer.overview.map.html
Upvote:2
I have never used myself but here is an app for navigation in airports including Frankfurt airport: here is the link.
Though when I visited Frankfurt Airport and needed to change terminals, I did not find it particularly difficult.
Upvote:3
Some of the terminals are mapped fairly well on OpenStreetMap, which you can export as images (click the Share button on the right-hand side, then Download).