We all take pictures with our phones but some of us want to grow the experience up a little. There is no shortage of companies that will sell you a way to do that, usually by attaching things like lenses that modify your phone's own lens (like the Moment and Olloclip lenses) or actual camera sensor / lens combinations that communicate with your phone via Bluetooth and Wi-Fi (like Sony's QX series, or the Japan-only Olympus Air).

The problem with the former is that is they degrade your phone's already tenuous image quality. And, so far, the problem with the latter is that they;re big and bulky, the software is sluggish, and the outboard sensors are so compact they hardly offer an improvement on your phone to begin with.

That's where the new DxO One camera comes in. Yes, it's another take on strapping a separate camera sensor and lens system to your iPhone, but it's the best one yet.

The first thing you notice about the DxO One is its size — DxO says it's the world's smallest 1-inch sensor camera. It's small and light, not much bigger than a zippo lighter. Yet inside is a 1-inch, 20.2 megapixel sensor. On the back is a small, touch-enabled menu screen for swiping between modes, and on the top is a two-stage shutter button.