Our friends at WoT WN Meter are giving away a free E-25 Premium TD, 1000 gold and 500 gold respectively, to users of their app.
Their app, Wot WN Meter is a mobile app for World of Tanks collecting and displaying statistics (Android for now, iOS version is coming soon).
You get detailed statistics, community derived WN7/8 rating, daily, weekly and monthly statistics with graphs (graphs will start count from the first query you make).
The app has an option to use multiple widgets and track multiple accounts so you can track your friends, with widget updates every 30 minutes, which allows you to always see your and other accounts real-time WN value.
Good luck and have fun!