If you are an avid smartphone photographer and frequently run out of space on your smartphone, you may find this useful. The result of a successful Kickstarter funding campaign, Meenova is offering a OTG microSD card reader for compatible Android phones for $12 plus $3 flat shipping world wide. This supports microSD* cards up to 64GB. This device does away with the need for a OTG cable to go between a standard card reader and your smartphone.
Please note, only some Android phones and Android versions (4.0+) support OTG (USB On The Go), so make sure your smartphone is the list of compatible devices. This includes the Galaxy flagships (S4, S3, S2), the HTC One, Moto X, LG G2, Xperia Z. Nexus devices require rooting or 3rd-party software. Some tablets are also compatible.
Via and more details and discussion at CNet.com. Further reading: USB On The Go (wackypedia).