Hyperlapse allows you to create amazing time-lapse videos (here's a recent video I made). If you don't have it, you need to get it (it's free)! Even with the built-in time-lapse feature in iOS 8, I still prefer Hyperlapse because of the built-in image stabilization. It really helps to smooth out the video.
It's simplicity is also it's downside. Because it's so simple to use, there aren't many features to adjust or settings to tweak... or are there? As you will see here, there actually are some hidden settings, including the ability to shoot at the full 1080p resolution (the default mode is 720p).
Accessing these features is not intuitive (at all) but as you will see, it will uncover a whole slew of additional features to play with.
Caution: be careful when you play with these settings. It may have negative side-affects.
To access the hidden features, use four fingers to tap on the screen four times. Below is a video showing you how to do this:
