The Xteink X4 is a wallet-sized e-reader from China that has attracted a cult following of tinkerers online for its no-frills charm and crisp 4.3-inch display. When I reviewed it last year, I had a few minor complaints, but "too big" definitely wasn't one of them—not surprising, given I was already an adherent of the phone-sized Boox Palma 2. But now that I have tested out the Xteink X3, the X4's even tinier brother, I can't help but wonder if there exists an e-reader so small I won't prefer it.

Xteink X3 E-reader

$79.03

at Xteink

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$79.03

at Xteink

Xteink X4

$69.00

at Amazon

Shop Now

$69.00

at Amazon

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The X3 has a 3.7-inch screen measured diagonally, which makes it about 14% smaller than the X4; including the bezels, it has an overall footprint that's roughly 20% smaller. When we're already talking about a device so small my wife rolled her eyes when I showed it to her, you'd think that downsizing would make it unusable—but after spending a few weeks using it to read one of the longest novels on my TBR (the 900-page 1985 western Lonesome Dove, by Larry McMurtry), not only did I find myself preferring the X3 for being even less obtrusive to carry around with me, I didn't think the loss of screen space affected the reading experience at all. (Here's where I note that if the idea of reading on such a cramped device makes you anxious, consider the possibility that this device is just not for you, or that the people who like it are nuts, or both.)

Credit: Joel Cunningham

A note on DRM-free e-books

Before I get more into the specifics of the X3, and important note: To ready anything on the X3 or the X4, you'll need e-book files that are free of digital rights management (DRM), which is software often included on media files that limits what devices they are usable on. I talk a bit more about this issue in my review of the X4; suffice it to say if you aren't willing to source DRM-free e-books or figure out how to remove the DRM yourself, this isn't the device for you.

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Sizing differences between the Xteink X3 and Xteink X4

The X4 measures 114 x 69 x 5.98 mm and weighs 74g, while the X3 is 98 x 64 x 4.98 mm and 55g. Both are small and light to be sure, but at about the size of a credit card, the X3 is so tiny, you might forget you're carrying it around. It's worth noting that while early images of the X4 advertised it could magnetically attach to the back of your phone (ostensibly so you'd flip your phone over to read instead of doomscrolling), it was too big to do so securely on my iPhone 14. The X3, on the other hand, is sized just right, though I still don't think I'd ever actually do this, as the connection is loose enough that the e-reader slides off the back of the phone when I take it out of my pocket.

Credit: Joel Cunningham

Readability differences between the Xteink X3 and Xteink X4

Compared to a Kindle Paperwhite's 6.8-inch screen, both the X3 and the X4 look pretty tiny, but I find both to be equally readable. Both offer 480x800 resolution, but because the screen on the X3 is smaller, the resolution is actually better, at 250ppi versus 220ppi for the X4. Unless you're about an inch from the screen, you probably won't be able to spot this difference with the naked eye, however—text on both is nice and crisp.

I prefer to read in portrait mode, and find both devices show enough text that I don't feel like I'm turning pages too often. If you instead read in landscape mode, here's a comparison showing how much text fits on a page (with a large-print trade paperback for scale):

Credit: Joel Cunningham

Battery and charging differences between the Xteink X3 and Xteink X4

Both devices have the same 650 mAh battery, which will give you at least two weeks of regular use on one charge, but how you charge them is different: While the X4 uses a standard USB-C cable, to save on space, the X3 has pogo pins on the back that require a special charging cable. I charge it rarely enough that this doesn't bother me, but I don't love needing to remember where I put yet another proprietary cable. (Members of the Xteink Reddit suggest a fix for this—a USB-C-to-pogo adapter—but that kinda just seems like something else I'd lose.)

Differences in buttons between the Xteink X3 and Xteink X4

While both have physical buttons, the X3 has one extra, adding discreet up/down (or is that left/right?) buttons on either side of the device, rather than the X4's single dual-function rocker on the right-hand side. This improves usability somewhat, as every once in a while I would put pressure on the wrong side of the X4's page-turn button, and move back a page instead of forward a page. (Both devices have the same dual-purpose buttons on the bottom front bezel, however, and they will still take a little while to get used to.) I also like that the power/sleep button has been moved to the top, where I'm less likely to press it accide

I'm Reading a 900-Page Novel on an E-Reader the Size of My Library Card, and It's Going Great