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Sonar is a platform for debugging mobile apps on iOS and Android. Visualize, inspect, and control your apps from a simple desktop interface. Use Sonar as is or extend it using the plugin API.
Sonar by FacebookExtensible mobile app debugging for iOS and Android
Daniel Bücheleleft a comment
I am not a big fan of web views, too. But it seems to be the only possible way to go, as neither the API nor the XMPP-interface exposes all features.
GoofyA Mac app for Facebook Messenger
GoofyA Mac app for Facebook Messenger