I'm sorry if this had been talk about before.
I mainly using Offline Maps(personal) from Google Maps.
But many time it can be inconvenience to switch between Online and Personal when some parts of the maps are not covered in the offline files.
I think it would be nice if the Online and Personal maps can work together.
If the tiles exist in offline files Locus use the offline data, if the tiles are not exist in offline files Locus will look in Online file, and if the tiles are not exist in Online file too Locus will download those tiles and store in Online file.
hmm you may use cache for online map also as storage for offline map. When you download map, tap on (on screen where you select zooms) bottom button "Type" and choose "SQLite shared". This will download data into your cache instead of separate file ... partial but working solution I think
How about the 2GB file limit ?
All my map files took about 8GB.
2GB limit is of course there .. don't even tell me, you downloaded 8GB from google maps ... god ...
City Map at higher zoom level took a lot space.
Only Osaka and surrounding area I traveled to took ~1.3GB already.
My data plan is limited so I have to make the offline maps cover almost every places.