WazzapMigrator converts your old Windows Phone WhatsApp Archive (messages.db) into the Android WhatsApp Archive (msgstore.db). Messages are split in chunks of 2500 messages each in order to avoid overloading your phone and convert them a piece at the time. Please note that WhatsApp restores messages on first run only, thus forcing the user to "trick" him by reinstalling or resetting WhatsApp.

Wazzapmigration diagragram