In the past few years, we have covered a whole host of smartphone microscopes here. The DIPLE is pretty special though. It is a portable kit that turns your phone or tablet into a microscope with 1000x magnification. It can be used to view cells, bacteria, and everything in between.
With the objective lens separate from your camera, you can view all kinds of samples and use the kit with phones of various shapes. You can take your DIPLE to the next level with filters. Expected to ship in May. You can find this product on Kickstarter at this time.