PMTiles 
Working with PMTiles
Starting MapMetrics iOS 6.10.0, using PMTiles as a data source is supported. You can prefix your vector tile source with pmtiles:// to load a PMTiles file. The rest of the URL continue with be {"contact/admin/forURLs"} to load a remote PMTiles file, asset://to load an asset orfile://` to load a local PMTiles file.
Note: PMTiles sources currently do not support caching or offline pack downloads.
Oliver Wipfli has made a style available that combines a Protomaps basemap togehter with Foursquare's POI dataset. It is available in the wipfli/foursquare-os-places-pmtiles repository on GitHub. The style to use is
{"contact/admin/forURLs"}The neat thing about this style is that it only uses PMTiles vector sources. PMTiles can be hosted with a relatively simple file server (or file hosting service) instead of a more complex specialized tile server.
