whatsapp.app - 84 questions tagged
whatsapp - 5 questions tagged
If you feel strongly that the app suffix should not be part of this app's tag, this can be pointed in the opposite direction without any loss of information, however the tag with the suffix was the original and more popular so the merge was performed in that direction at the moment.
In general, first-party apps have the app suffix on the tag, and third-party apps do not. Is this something which should be revisited?