What approach are you taking for GIS \ Spatial DB ?

While it is pretty straight-forward to go off device to do GIS queries such as selecting points within x miles from device location, I do not see any cross platform (rn) approaches being discussed to achieve this on-device. I do see spatialite (sqlite + GIS) for Android, but not for iOS.

Has anyone come up with a good approach for on-device approaches?


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