It's about the same size as an Xteink while being a more capable device that features a touch screen, a mic, and higher pixel density, only costs $50, and Crosspoint OS (eReader software made for the Xteink X4) supports it. So it can be turned into a great little e-reader.

E-paper has been having a bit of a moment recently. First, the Boox Palma shrank the form factor of eReaders down to something a bit more pocketable and less proprietary than the Kindle. Then, open source developers seized upon and installed custom firmware on the Xteink X4 and X3, cheap no-frills eReaders that snap to the back of your phone and are just enough for many people.

The X4 was clearly a huge success, as Xteink is following this up with the X3 Pro and X4 Pro and Boox has announced their micro ereader competitor the Boox Picco.

But bare bones e-paper is anyone’s game at this point, and so Seeed Studio has thrown their hat in the game with the reTerminal Sticky, an even cheaper and more capable small magnetic eInk display that leans in on the entire angle that made the X4 a viral sensation.