MAPS.ME vs OpenLayers: What are the differences?

What is MAPS.ME? Offline OpenStreetMap maps for iOS/Android. MAPS.ME is an open source cross-platform offline maps application, built on top of crowd-sourced OpenStreetMap data. It was publicly released for iOS and Android.

What is OpenLayers? A high-performance, feature-packed library for all your mapping needs. An opensource javascript library to load, display and render maps from multiple sources on web pages.

MAPS.ME and OpenLayers can be primarily classified as "Mapping APIs" tools.

Some of the features offered by MAPS.ME are:

• Totally Offline
• WorldWide
• Really Fast

On the other hand, OpenLayers provides the following key features:

• Tiled Layers - Pull tiles from OSM, Bing, MapBox, Stamen, MapQuest, and any other XYZ source you can find. OGC mapping services and untiled layers also supported.
• Fast & Mobile Ready - Mobile support out of the box. Build lightweight custom profiles with just the components you need.
• Vector Layers - Render vector data from GeoJSON, TopoJSON, KML, GML, and a growing number of other formats.

MAPS.ME and OpenLayers are both open source tools. It seems that OpenLayers with 5.17K GitHub stars and 1.97K forks on GitHub has more adoption than MAPS.ME with 3.05K GitHub stars and 660 GitHub forks.