The Xteink X4 is a beautiful device you cannot actually use

The core issue lies in the device’s strict requirement for DRM-free EPUB files. While the hardware is well-designed and highly portable, it lacks support for the encrypted formats used by major retailers like Amazon or library services such as Libby. For the average reader, this means the X4 is essentially a dedicated machine for public-domain classics. Even after installing third-party firmware to improve the user interface, the content restriction remains an insurmountable barrier to daily use.

This limitation highlights a broader frustration in the digital reading ecosystem, where consumers are increasingly locked into specific hardware ecosystems. Amazon’s decision to remove the ability to download library files to a computer in early 2025 has only tightened these constraints. Without a transition to an Android-based operating system—which would allow for the installation of the Kindle or Libby apps—the Xteink X4 remains a niche curiosity rather than a practical tool for the modern reader.