關於「Oyster card app」標籤，搜尋引擎有相關的訊息討論：

Oyster Info (@OysterInfoApp) / Twittertwitter.com › oysterinfoappTfL Oyster and contactless - Google Play 應用程式play.google.com › store › apps › details › gl=USTfL Oyster and contactless - Apps on Google Playplay.google.com › store › apps › details › gl=USHow to Use the Oyster Ca