Hyperlapse allows you to take time-lapse videos, without the need for fancy, expensive equipment. It's really easy to use, and has a beautiful interface. You push one button to record the video, and then speed it up to various degrees using a separate button.
You can then upload the video you made to Instagram and Facebook at the touch of yet one other button.
Sound simple? That's because it is. And people are using it to make some awesome-looking, creative videos.