By Lauren Aguirre

Learning something new takes time and discipline — especially when learning a new language. You have to stay disciplined in your study, even when it feels like you're getting absolutely nowhere. You don't have to squirrel yourself away with a boring textbook for hours on end anymore. Now, there are plenty of mobile apps to keep up your learning on the go. These are the perfect tools to motivate study in little bursts every single day. Best of all, these four apps can be used without having to pay a single cent.