[eofster]

The app doesn't use the low-resolution tiles. The app only works on the high-resolution displays.

I don't load tiles from the severs other than the own ones. Not only am I aware of the OpenStreetMap's rules about it. It is also an important part of the privacy guarantee. No third party gets information about the loaded map tiles. This information is not stored, not collected, and not shared with anybody.

[habi]

I meant the (free) low-zoom vs. (paid) high-zoom tiles.

Can you tell us a bit about your rendering pipeline?

[eofster]

Absolutely! What exactly do you want to know? The rendering pipeline is the most standard one: Mapnik, Postgres, openstreetmap-carto, renderd. Everything is hosted on the own servers.

By resolution I mean exactly this - resolution. High-resolution tiles, also known as retina tiles. Low-resolution tiles are not used at all. All of that is not related to zoom.

If this wasn't clearly communicated by me: all zoom levels are rendered by the own servers.