Xteink, a Chinese startup, launched its compact X4 and X3 e-readers in late 2025 and now offers both at 20% off for Amazon Prime Day 2026, which runs through June 26 [1, 2, 3].
The Xteink X4 has a 4.3-inch e-ink display and costs $69 normally, but the Prime Day price reduces it to about $55. Its smaller sibling, the X3, features a 3.7-inch screen and is priced at $79 regularly and $63 during the sale [1, 2, 3]. Both devices are designed to magnetically attach to the backs of phones but prioritize pocket portability, with Max Glenister noting, "The real portability win is the size and weight, not the phone mount. This thing actually fits in a trouser pocket and disappears" [4].
Neither model includes common modern features like touchscreens, front lighting, AI integration, or direct access to online e-book stores. Instead, they focus on simplicity and offline book storage with basic firmware out of the box [2, 3]. Both can be easily upgraded by flashing free CrossPoint Reader firmware, offering more polish and customization options [4, 1, 2].
The Xteink X4 and X3 have built a cult following among tech-savvy users since their debut, praised for their unique form factor and straightforward functionality [2, 3]. The current 20% discount deal ends today, June 26, marking the last day to purchase them at this reduced price during Prime Day 2026 [5, 3].
