Comparison Tool

Compare Xteink e-readers: X3, X4 & X4 Pro specs side by side

Add or drop any device and its column appears instantly. Compare specs and available colours together, flip on Differences only to cut to what actually changes, and share the link — your picks travel in the URL.

Every value is tagged by how confirmed it is, so nothing speculative reads as fact. Prefer the full static table? See the whole lineup →

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Differences only

Compare	Available Xteink X4 Pro $99 Details Buy	Available Xteink X4 $69 Details Buy	Available Xteink X3 $69 Details Buy
Colours	Space BlackWhite?	Space BlackMist Gray	Space BlackMist Gray
OS / platform	XTOS (non-Android)	Proprietary firmware*	Proprietary firmware*
Screen	4.3" E Ink, 219 PPI	4.3" E Ink	3.7" E Ink
Resolution	219 PPI	220 PPI	259 PPI
Front light	Yes — adjustable brightness + warm/cool	No	No
Touchscreen	Yes + side page-turn buttons	No	No
Chip	Not disclosed?	ESP32	ESP32-based*
Storage	16 GB microSD, exp. 256 GB	16 GB microSD, exp. 256 GB	16 GB microSD, exp. 256 GB
Charging	Magnetic pogo-pin	USB-C	Magnetic pogo-pin
Battery	1,100 mAh	650 mAh	650 mAh
Dimensions	111 × 69 × 5.95 mm	114 × 69 × 5.9 mm	97.6 × 63.7 × 5.1 mm
Weight	72 g	77 g	58 g
Thickness	5.95 mm	5.9 mm	5.1 mm
Magnetic mount	Yes — built-in magnetic backplate	Yes	Yes
Price	$99	$69	$69

No mark Confirmed on xteink.com * Press-reported, not yet on the official store ? Rumored / unconfirmed

X3, X4, and X4 Pro specs and colours are verified against xteink.com (July 2026); the X4 Pro white finish appears in a launch render but isn't a buyable option yet. S4 details are compiled from press and community sources. Independent list, not affiliated with Xteink.

The short version

All three are pocket-sized E Ink readers; the differences come down to size, charging, and whether you want a light. The tool above lays every spec side by side — here's the one-line take on each, and where to go for the full verdict.

Xteink X3 — $79 · the smallest one. A 3.7-inch, 259-PPI reader at 58 g that rides on the back of your phone via magnets, charging over a proprietary magnetic pogo-pin cable rather than USB-C.
Xteink X4 — $69 · the mainstream pick. The larger 4.3-inch model most people buy, on plain USB-C, and the hub of the custom-firmware scene. No front light or touchscreen — by design.
Xteink X4 Pro — $99 · the night-reading pick. The first pocket Xteink with an adjustable warm/cool front light and a touchscreen; thinner and lighter than the X4 with a bigger battery, but pogo-pin charging replaces USB-C.

Want a recommendation rather than a spec sheet? Read Xteink X3 vs X4: choose by carry style or, if the new model is in the mix, Xteink X4 vs X4 Pro vs S4: which to buy in 2026.

Common questions

What is the difference between the Xteink X3 and X4?

The X4 has the larger 4.3-inch E Ink screen and charges over standard USB-C; the X3 is smaller (3.7-inch, 58 g) and charges through a proprietary magnetic pogo-pin cable. Neither has a front light or a touchscreen — those arrived with the X4 Pro. The X4 is $69 and the X3 is $79.

Which Xteink has a front light?

Only the Xteink X4 Pro ($99), launched July 21, 2026. It is the first pocket Xteink with an adjustable warm/cool front light and a touchscreen; the X3 and X4 have neither.

Which is the smallest Xteink e-reader?

The X3 — a 3.7-inch, 259-PPI E Ink reader weighing 58 g, designed to ride on the back of your phone via magnets. The X4 and X4 Pro use a larger 4.3-inch screen.

Do any Xteink readers charge over USB-C?

Only the X4. The X3 and X4 Pro both charge through a magnetic pogo-pin connector — the X4 Pro includes a magnetic adapter but no cable in the box. If plain USB-C is a hard requirement, choose the X4.

Which Xteink should I buy?

For most people, the X4 at $69. Pick the X3 if you want the smallest model and phone-back carry, or the X4 Pro at $99 if you read in the dark and want a front light plus a touchscreen. Our X3-vs-X4 and X4-vs-X4-Pro-vs-S4 guides walk through the full trade-offs.