Here is a thin keyboard that lets you type on your smartphone or tablet conveniently anywhere. Wekey Pocket is under .24in thick. It is slim enough to fit in your pocket. It has a flexible, wearable PCB. The device has a water resistant design and comes with a 200 mAh battery that can go without a recharge for months.
Wekey Pocket has a QWERTY layout. It is compatible with iOS, Android, and Windows devices. The product is expected to ship in September.[Source]