If you’re a fan of George R. R. Martin’s hit book series and accompanying TV show Game of Thrones, then you’ll want to download the official companion app. After coming to the iOS App Store last year, an Android version has been released just in time for the premiere of season 3 on HBO March 31st.

The “A World of Ice and Fire” app has a catalog of over 540 characters and 380 places. There’s also interactive maps of the different kingdoms to explore.

A recent update adds 30 new location illustrations, new character profiles, and the ability to search for characters by nicknames (search for Tyrion as “The Imp,” etc.). Perhaps the coolest feature is the ability to block the books you haven’t read yet, which in turn keeps the app spoiler-free.

Game of Thrones has such a massive mythology behind it that it’s sometimes hard to keep track of all the characters and houses. That’s what this app is for, and it looks great.

A World of Ice and Fire is free to download, but you’ll only get to learn about 8 characters from the first book. Unlocking all the other info costs $1 per book, or $5 for everything.

You can download the app now in Google Play and on the App Store.

• ViaMashable