Xteink X4 Pro Brings Touch and Frontlight to $99 eReader

The Cult Pocket eReader Grows Up

Xteink released the X4 Pro on July 21, 2026, and the spec deltas over the original X4 read like a wishlist the community wrote. Same pocketable 4.3-inch E Ink panel at 219 ppi, but now with a capacitive touchscreen, a frontlight for night reading, and a 1,100mAh battery — a 69% capacity bump over the X4's 650mAh cell. Price: $99, with a free magnetic case thrown in at launch. For a device category where the entry ticket is usually double that, this is an aggressive spec-per-dollar play.

• 4.3-inch E Ink touchscreen at 219 ppi, now with frontlight, in a 5.98mm-thin body
• 1,100mAh battery, up from 650mAh in the original X4
• 16GB internal storage plus microSD expansion up to 256GB, physical page-turn buttons retained
• $99 through Xteink's site, free magnetic case included at launch

What Did the Pro Actually Change?

The two headline additions — touch and frontlight — fix the original X4's most-cited gaps, and Xteink managed both while keeping the body at a remarkably slim 5.98mm. Crucially for the faithful, the physical page-turn buttons survived the redesign, so the touchscreen is an addition rather than a replacement. Storage doubles up too: 16GB internal for your EPUB library, expandable to 256GB via microSD, which at typical ebook sizes is functionally infinite.

Why Do Hackers Care About a $99 eReader?

Because of what runs underneath. The X4 line is built on an ESP32-class microcontroller rather than a locked-down Android SoC, and it has attracted a genuine open-source firmware scene. CrossPoint Reader — a community-built, fully open replacement firmware — already delivers EPUB 2/3 rendering, dictionary lookups, bookmarks, custom fonts from the SD card, KOReader progress sync, and a web-based flashing tool that makes installation nearly effortless. Reports around the X4 Pro launch indicate CrossPoint support is coming to the new hardware as well.

That combination — commodity microcontroller, replaceable firmware, microSD storage — makes the X4 Pro less a sealed consumer gadget and more an open reading platform. It is the same hackable-hardware energy we have covered in ESP32-based smart home devices, applied to books.

The Spec-Sheet Verdict

A 219 ppi E Ink panel with a frontlight, two-week-class battery life, expandable storage, and an active open firmware community for $99 is simply a strong deal. The broader trend is worth celebrating too: small hardware makers are finding sustainable niches by shipping devices the big platforms consider too weird — pocket eReaders, tiny Arduino boards, single-purpose gadgets — and leaning into openness as a feature. More of this, please. Our mini computers coverage tracks the whole scene.

Sources: Liliputing — July 21, 2026; The eBook Reader Blog — July 21, 2026; Notebookcheck — July 2026.