Memrise

Best language learning app I've used.

Pros:

It's free

Cons:

Daily tasks are the same.

Memrise does a really good job and the UX is fantastic to boot

Really useful for learning Japanese! Similar game-ified style as duolingo

You can create your own course with this app and learn anything!

Pros:

easy to use

Cons:

not found

so powerfull tool, i learnt russian and trying to learn chinese nowadays

Do you use this, @lennyhu?

I have in the past, but couldn't maintain the habit because they didn't yet have an app. Their method does work though - learned to memorize a deck of cards fairly quickly!