TL;DR: Get a lifetime subscription to Qlango Language Learning, with 71 languages included, for $49 (reg. $239).

Learning a new language is no small feat, but this app is making it a little bit easier. Qlango isn't trying to guilt-trip you into a 365-day streak – it's more like a video game that happens to teach you Croatian . Or Korean. Or Esperanto, if you're that kind of guy. And, right now, lifetime access is available for $49 (MSRP $239).

Science-backed language learning techniques

Here's what actually makes Qlango different from the sea of language apps out there: spaced repetition. It's a scientifically backed technique where the app reintroduces vocabulary at spaced intervals, right before you'd normally forget it. Think of it as hitting "save" on words your brain keeps trying to delete.…