The Xteink X4 E-Ink Reader

The Xteink X4 is a £40, pocket-sized 4.3-inch e-ink reader that can be mounted on phones via MagSafe, featuring a 650mAh battery lasting up to 14 days and expandable 16GB storage. While the stock firmware is minimal, custom firmware options like Papyrix and Inx significantly enhance functionality with advanced typography, multi-format support, wireless syncing, and reading statistics. The device's true appeal lies in its portability and the robust community-developed software ecosystem that transforms it into a capable reading device despite its low price point.