The Sleep Cycle app was quick and easy to set up on my iPhone, and after a quick scout around its features I was ready to set it up by my bed. Because I was keen to see how the smart alarm worked ...

I've tested my fair share of them, and honestly, most are just fancy alarm clocks with a calming soundtrack. But the Rise Science sleep app caught my attention -- and that doesn’t happen often.

Now, I don't know about you, but the phrase "military secrets" immediately piqued my interest. So, what does this app actually do? It's got a massive library of sleep sounds. We’re talking all ...