General :: Storing Offline Maps With Different Zoom Levels?

I need an application with which I can store maps with different zoom levels. I remember the application "Istanbul Map" let me do this and I could download Google (or other sources') maps from the zoom level I was in up to the maximum zoom level of my preference. Therefore, assuming that I had downloaded the map, when zoomed out I could only see street names and when zoomed in I could see the shops and their names or any other details corresponding to that zoom level, in case I had set the maximum zoom level to 17, 18 or 19.

However it's been two years that I haven't used that application and now that I downloaded "Istanbul Map" from Google Play I noticed that it doesn't offer the same features as before and it seems that it is specifically for Istanbul. Besides, I need to buy the application in order to use it while the previous versions were free.

Now that I am going on a trip and while on way I might need to zoom in up to the 18th zoom level to see the names of stores or other details. So I need an application that provides me the same feature as the old "Istanbul Map" letting me download Google maps for different zoom levels.The built-in Google maps application only allows to download a map with a fixed zoom level and it is useless for me.