I like the look of Sidekix.

Google maps does a pretty good job of walking routes already but I'm often thinking of something like:
I need to get from A to B but on the way I want to get some adaptors/shoelaces/food shopping/SIM card/printing done etc or stop for a beer/ice-cream/coffee/dinner with making a huge detour.

Having said that the voracious Google monster is catching up on that too and will soon make all other apps redundant and implode on itself.

the other thing looks like Tinder/Grindr and therefore Inappropriate for me.