Q&A for gamemasters and players of tabletop, paper-and-pencil role-playing games
select count(PostId) from PostTags, Tags where Tags.TagName = 'android' and Tags.Id = PostTags.TagId except select PostId from PostTags, Tags where Tags.Id = PostTags.TagId and Tags.TagName in ('jquery-mobile', 'mobile-website', 'cordova', 'cordova-2.0.0', 'cordova-3', 'phonegap', 'phonegap-plugins', 'titanium', 'titanium-allow', 'titanium-mobile', 'itatnium-modules', 'appcelerator-mobile')