The e-reader market has long been dominated by walled gardens that force users into specific bookstores, but the new Xteink S4 is looking to change that narrative. By pivoting from a proprietary Linux-based OS to an open Android 11 platform, this 4.3-inch device allows readers to break free from ecosystem lock-in, enabling the installation of third-party apps like Kindle, Kobo, and the highly customizable KOReader.
Measuring just 6.98mm thick and weighing a mere 95 grams, the S4 is designed for true portability, fitting easily into pockets where traditional 6-inch or 7-inch tablets would be cumbersome. While its compact footprint is the primary selling point, the hardware improvements over previous iterations address several long-standing user pain points.
Hardware Upgrades and Practical Utility
Beyond the operating system, Xteink has refined the physical experience. The S4 features a 220 PPI E Ink touchscreen that prioritizes clarity for long-form reading. Crucially, the company has added an adjustable front light capable of shifting between cool and warm tones, a feature that significantly improves late-night reading comfort. The device also packs a 1,400mAh battery, a notable jump that should provide enough longevity to satisfy most commuters and travelers.
For those who prefer tactile interaction, the S4 retains dedicated side page-turn buttons, supplemented by a new front-facing home button for easier navigation. The backplate even includes magnets compatible with MagSafe accessories, allowing for creative mounting or grip solutions that are rarely seen in the e-reader space.
Performance and Ecosystem Freedom
Internally, the device is powered by 2GB of RAM and 32GB of storage, which is more than sufficient for storing thousands of EPUB and PDF files. The inclusion of Wi-Fi and Bluetooth ensures that users can sync their libraries and connect wireless headphones for audiobook playback without needing extra adapters. Charging and data management are handled via a modern USB-C port, cementing its place as a contemporary piece of hardware.
However, the S4 is currently limited to the Chinese market, where it is retailing for approximately $50 (roughly 335 CNY). While this price point is highly competitive, it is currently unclear if this is a temporary promotional rate or the standard retail cost. International availability remains an open question, and while there is an expectation of a wider rollout, potential buyers outside of China will have to wait for official confirmation regarding regional pricing and support.
