Are you frustrated that after you have bought a nice macro or fish-eye lens, you can only use it on one device? With more people taking up mobile phone photography and more people are having more than one device, it means a lot that you can use the lens on any devices.
Now, there is this kickstarter project that might solve this problem. By using the concept of a clothes peg with a lens, it is able to allow the lens on any devices. It can be your tablet or mobile phones. Check out this video.
They are now some way to go before being funded. If you are interested, do check out their Kickstarter page.