There are two great app that use OSM data that I see a lot of people use.
* Maps.me - I used it a lot when travelling last year in Southeast Asia. And I noticed many other travellers were using it too. It was basically expected that people use Maps.me there.
I guess it helps that it's also integrated with booking.com data so you have a lot of hostels there if you are looking for a place to stay in new cit. However it's a shame that it's not actual POI data from OSM. I had situations where there were two hostels on map, one from OSM and one from booking.com. booking.com was usually wrong by couple of meters, I guess because only owner with booking.com accound could change it...
* Mapy.cz - I mostly dumped masp.me for this app (it has good website too https://en.mapy.cz/). This app is also using OSM data, but shows information more helpful for tourist/biker. Bike paths are superbly displayed, hiking trails often have proper colors (I still need to check if it's OSM tag's data). I highly recommend it.
I tried OSMAnd and IMO this is really mainly for "OSM enthusiasts", not for causal "normal" users that just want to have good map and know where to walk or bike to.
* Maps.me - I used it a lot when travelling last year in Southeast Asia. And I noticed many other travellers were using it too. It was basically expected that people use Maps.me there. I guess it helps that it's also integrated with booking.com data so you have a lot of hostels there if you are looking for a place to stay in new cit. However it's a shame that it's not actual POI data from OSM. I had situations where there were two hostels on map, one from OSM and one from booking.com. booking.com was usually wrong by couple of meters, I guess because only owner with booking.com accound could change it...
* Mapy.cz - I mostly dumped masp.me for this app (it has good website too https://en.mapy.cz/). This app is also using OSM data, but shows information more helpful for tourist/biker. Bike paths are superbly displayed, hiking trails often have proper colors (I still need to check if it's OSM tag's data). I highly recommend it.
I tried OSMAnd and IMO this is really mainly for "OSM enthusiasts", not for causal "normal" users that just want to have good map and know where to walk or bike to.