[気になるアプリ] GlobalApps - App ranking of the world (Utilities) [無料]
GlobalApps can check App Store ranking of the worldwide. Let's check the ranking of countries other than own. Ranking data is not synchronized with the App Store and is updated every few hours.
via appshopper.com
なんとなく気になる海外のApp Store事情。
これを入れておけば、すぐにチェックできますね。