Xteink X3 vs X4: Size, Specs, and Which to Buy

The Xteink X4 (4.3-inch screen, 77 g, USB-C) is the better first pick for most readers; the Xteink X3 (3.7-inch screen, 58 g, magnetic pogo-pin charging) wins only if the smallest possible pocket carry is the whole point. Both cost $69 at xteink.com, so price does not decide this. Size, charging, and firmware support do.

That framing gets easier once you stop treating it like a normal spec sheet. Both are tiny, single-purpose reading devices designed to pull you off your phone, and one r/XTEINK owner summed up the appeal: they “saved 8 hours and 40 minutes of doomscrolling by… READING! This is the first book I’ve finished in years.” The real question is which pocket e-reader you will actually carry, open, and read.

Yes, the X3 is smaller. Yes, the X4 has the larger screen. But that is not the real decision. The real decision is how you want this tiny e-reader to live with you: in a pocket, on the back of a phone, beside a Kindle, inside a pouch, or as a little firmware project you keep improving.

That last line matters. Xteink is best understood as a pocket companion reader, not a full-size e-reader replacement for everyone.

Which Xteink Should You Buy, the X3 or X4?

Buy the Xteink X4 unless the smallest possible pocket carry is your top priority, in which case buy the Xteink X3; both are $69, so the decision is size and habits, not price.

Most people asking “X3 or X4” are not chasing specs; they are trying to break a phone habit. The recurring r/XTEINK story is a reading slump cured by a device with no notifications, no browser, and no feed. One owner credited short chapters and a device small enough to “get locked in again” for breaking years of stalling.

So the real question is not “which has the higher resolution” but “which size will I keep on me, and which one matches how I read?” An X3 that lives in a drawer loses to an X4 that lives in your jacket, and vice versa. This guide answers through carry style and reading habits first, with the full spec table at the end.

Which Is Better: Xteink X3 or X4?

For most readers the Xteink X4 is better: the larger 4.3-inch screen, USB-C charging, and a more forgiving first-device experience make it the safer $69 pick. The Xteink X3 is better only when the smallest possible carry is the whole point; it is 19 g lighter and small enough to disappear into a coin pocket. That is the short version, and here it is as a chooser:

What Is the Difference Between the Xteink X3 and X4?

Three differences decide the Xteink X3 vs X4 choice: screen size, charging, and body size. The X3 has a 3.7-inch E Ink display at 528×792, a magnetic pogo-pin charging port, and NFC. The X4 has a larger 4.3-inch E Ink display at 480×800 and charges over USB-C. Neither has a front light or a touchscreen, and both weigh little: the X3 is 58 g, the X4 is 77 g.

A note on sharpness, since spec listings can mislead here: the X3’s 528×792 panel is actually a slightly higher resolution than the X4’s 480×800, and because it packs those pixels into a smaller 3.7-inch screen, its pixel density (PPI) is higher still. That is not a contradiction. In practice both panels are crisp for text; the meaningful difference is how much text fits on screen at your preferred font size, not pixel density.

Those numbers are useful, but the buying decision should be framed around daily use.

Which Is Newer: the Xteink X3 or X4?

The Xteink X4 is the newer of the two models; the Xteink X3 is the older, smaller sibling. The clearest verifiable clue sits in the firmware scene: the X3 ships with an older factory bootloader than the X4, which CrossPoint’s maintainers had to patch around so one binary boots on both devices. In practice the age gap changes nothing: Xteink sells both side by side at $69, and both run current CrossPoint and the other major firmware forks. And if “newest Xteink” is what you are really shopping for, that is neither of these: the Xteink X4 Pro launched on July 21, 2026 at $99, a different (touchscreen, front-lit, pricier) proposition covered in the X4 vs S4 vs X4 Pro guide.

Xteink X3 vs X4 Size Comparison: Exact Dimensions and Weight

The Xteink X3 is 16.4 mm shorter, 5.3 mm narrower, and 19 g lighter than the X4. Both are genuinely pocket-sized; the X3 is the one that disappears into a coin pocket, while the X4 trades a little bulk for a noticeably larger reading area.

Both figures come from the official specifications tables on xteink.com. In hand, the X3 feels closer to a small stack of credit cards and the X4 closer to a passport, but the numbers are the honest comparison: the X4 is about a centimetre and a half taller, and that extra height is what buys the bigger screen.

Factor 1: Pocketability (The Pocket E-Reader Test)

Pocketability is the X3’s strongest argument.

The X4 is already small, but the X3 is the model that makes people say, “I could keep this with me all the time.” That changes the product. It stops being a smaller Kindle and starts becoming a reading object you use in checkout lines, car washes, cafes, commutes, school pickup, and the other small gaps where phones usually win.

Pick X3 if the whole point is that the reader disappears into your day.

Pick X4 if you still want pocketable, but you do not want the screen to feel quite so constrained.

Repairability is a real model-choice factor once you accept both panels can break: the X3’s pogo-pin panel is easier to swap than the X4’s USB-C build, though the full X4 screen-replacement teardown is well documented if you go that route.

I carried the X4 in the front pocket of straight-cut jeans for two weeks. It fit without bulk, sat flat, and was easy to pull out one-handed. The only awkward moment was in shorts with shallow pockets, where it rode slightly high. Jacket chest pocket is the best carry: the X4 is essentially invisible there and immediately accessible. I never put it in a back pocket after reading about cracked screens.

Factor 2: Reading Comfort

The screen-size tradeoff is simple: X3 is easier to carry, X4 is easier to read.

That does not mean the X3 is unreadable. It means you need to be honest about font size. If you are happy with smaller text and short sessions, the X3 can be charming. If you prefer larger fonts, generous line spacing, or half-hour reading sessions, the X4 is the easier recommendation.

The wrong way to present this is “X3 small, X4 big.”

The useful way to present it is:

If someone is already worried that a tiny reader might be too small, the X4 is the safer recommendation.

One question that comes up constantly: does either have a backlight? No. Neither the X3 nor the X4 has a front light, so both need ambient light to read: a lamp, daylight, or a clip-on book light. If you read in bed with the lights off, that is a genuine dealbreaker for both models, and the X3 vs X4 choice does not change it. Plan to add an external light rather than expecting a glow from the screen.

Factor 3: Charging And Cable Friction

This is the X3’s biggest everyday compromise.

The X4 uses USB-C. The X3 uses a magnetic pogo-pin cable. That helps the X3 stay thin, but it also means one more special cable to keep track of.

For some users, that is no big deal. Battery life is long enough that you may not charge daily. The cable is included. If the X3 is mostly a small reading sidekick, the tradeoff can be acceptable.

For other users, proprietary charging is exactly the kind of annoyance that makes a device stay in a drawer. If you travel often, rotate bags, hate special cables, or want every device to share the same charger, the X4 is much easier to justify.

Factor 4: Phone-Back And Magnetic Use

Phone-back reading is one of the reasons people notice Xteink in the first place. The idea is irresistible: stick a tiny e-reader to your phone, carry both together, and read without opening the phone screen.

But this needs careful framing.

The official X3 comparison presents the X3 as having an optimized magnetic design for wider phone compatibility, while the X4 is presented as magnetic-ready with more limited compatibility. The X4 product page also highlights magnetic stick-on rings as part of the setup.

Real-world commentary is more mixed. The X3 shape fits phone-back use better, but magnet strength, phone size, case thickness, pocket movement, and ring placement all matter. The X4 is larger and can feel more awkward on the back of a phone, but it has an established magnetic accessory story.

So do not present this as “X3 wins magnets.”

Present it like this:

If phone-back carry is the main reason someone wants Xteink, they should treat the magnet setup as a carry system, not just a product feature.

Factor 5: NFC And Automation

The X3 is the more interesting model if you like automation.

Community evidence around Xteink includes owners using NFC for practical shortcuts, such as tapping the X3 to a phone to trigger hotspot or file-manager workflows. That is not the normal e-reader buyer story, but it is exactly the kind of thing that makes Xteink different from Kindle or Kobo.

Pick X3 if you enjoy small automation loops:

• tap-to-open transfer workflow
• phone shortcut triggers
• NFC shortcut triggers for custom automations
• “tiny e-paper tool” use cases beyond normal reading

Pick X4 if you simply want to read and do not want the device to become another project.

Factor 6: Firmware And Tinkering

Firmware is a real part of the Xteink buying decision.

CrossPoint is the main community firmware and runs on both the X3 and X4, so this is no longer an X4-only story. But the fork ecosystem is uneven, and that asymmetry can decide the Xteink X3 vs X4 question for tinkerers. Here is the map of what runs where, sorted by the axis that matters for this decision, which model each fork supports:

Beyond these, a few niche forks exist: AvesO3 (an AO3 fanfiction reader) targets the X4 and needs an unlocked device, with X3 support unverified; a CrossPet virtual pet and a chess/PGN viewer also circulate, all proof these are hackable little computers, not just readers.

The takeaway: both models tinker well and share the main CrossPoint, CrossInk, SUMI, and Papyrix builds, but the X4 has the deeper bench because Microreader and INX are X4-only, with no X3-exclusive fork to balance them. Verify the current build for your exact model before buying specifically for one fork.

There is also a purchase-channel issue. Reports in early May 2026 described firmware flashing restrictions on some Xteink devices in certain markets, while Xteink said overseas versions bought through the official website were not being restricted. The locked-vs-unlocked buying guide ranks sellers by risk and has the arrival-day test you should run before flashing anything.

A couple of post-flash realities worth setting expectations on, since they affect both models equally:

• Battery percentage can read erratically on CrossPoint, a known open issue. It does not mean your battery is failing; the simplest workaround is to hide the battery percentage in the reader UI.
• White X4 owners sometimes see the screen wash out in direct sunlight. CrossPoint includes a Sunlight Fading Fix toggle under Display settings for exactly this, so it is a setting, not a defect.

That means firmware-minded buyers should not treat “X3 vs X4” as the only decision.

They should also ask:

• Where am I buying it?
• Is this the overseas/direct version?
• Do I care about third-party firmware, and is my preferred fork available for this model?
• Is CrossPoint or my preferred firmware ready for this exact model?
• Can I recover if flashing fails?

For a normal reader, firmware is a bonus.

For a tinkerer, firmware status can be the deciding factor.

Factor 7: Kindle And Kobo Expectations

Do not sell either Xteink model as a direct Kindle/Kobo replacement without qualification.

Both models are tiny. Both lack a front light. Both lack a touchscreen. Both are better for simple EPUBs, TXT files, saved essays, fanfic, and light reading than for PDFs, comics, textbooks, or complex layouts.

The better framing is:

The Xteink pitch is not “replace your Kindle.”

The stronger pitch is “read in the moments where your Kindle is not with you.”

The Buyer Scenarios

Most people fit one of these. Find yourself, then buy accordingly.

How to Decide in 3 Steps

If the buyer scenarios did not pin you down, run this short decision.

Steps:

1. Answer the carry question honestly. Where will this actually live: a small front pocket every day, or a bag and a nightstand? Daily-pocket answer leans X3; bag-and-desk answer leans X4. The device you keep on you wins.
2. Set your font and session length. If you read in 2–10 minute gaps and are fine with smaller text, the X3 fits. If you want larger fonts or 20–45 minute sessions, choose the X4: fewer page turns, less squinting.
3. Apply the tiebreaker. Still split? Use the rule: if the X3’s size excites you, buy the X3; if it worries you, buy the X4. Then sanity-check the dealbreakers: neither has a backlight, both crack in a back pocket, and library/Kindle DRM books will not just open.

Xteink X3 vs X4 Specs, Side by Side

The spec-sheet summary: the Xteink X3 and X4 share a $69 price, microSD storage, and the same omissions (no front light, no touchscreen). They differ on exactly three lines: screen (3.7-inch 528×792 vs 4.3-inch 480×800), weight (58 g vs 77 g), and charging (magnetic pogo-pin vs USB-C). The recommendation comes first; the specs just confirm it.

And the quick reasons not to buy each one:

Final Verdict And Next Step

The whole Xteink X3 vs X4 comparison comes down to three lines:

• Buy the X3 if you want a reader that almost disappears into a pocket. The smaller body is the feature, and you accept a proprietary magnetic charging cable and smaller text. (Order direct from Xteink, or check the X3 on Amazon.)
• Buy the X4 if you want the tiny-reader idea with less compromise: bigger screen, USB-C, a more forgiving first device, and the deeper firmware bench. (Order direct from Xteink, or check the X4 on Amazon.)
• Buy neither as a Kindle replacement. No backlight, no touchscreen, and DRM library/Kindle books will not just open. Both shine as focused pocket readers that win the moments your phone usually steals.

Next step depends on where you are in the journey:

Quick Answers Before You Buy

Does the X3 or X4 have a backlight?

No. Neither model has a front light, so both need ambient light: a lamp, daylight, or a clip-on book light. If you read in the dark, that is a dealbreaker for both, and the X3-vs-X4 choice does not change it.

Can I read library (Libby / OverDrive) books on it?

No. Libby lends DRM-protected EPUBs, and CrossPoint cannot open DRM-protected files; there is no Libby app on either model. You can read titles you own outright or public-domain books; plan your library workflow around DRM-free sources.

Will my Kindle books transfer over?

Only DRM-free ones. The device reads DRM-free EPUB and TXT cleanly, so start with books you already own DRM-free and test three to five before assuming your whole shelf will move. A frictionless "all my Kindle books, instantly" experience is the single most common reason people return one.

Which is newer, the Xteink X3 or the X4?

The Xteink X4 is the newer model; the X3 is the older, smaller sibling and even ships with an older factory bootloader that CrossPoint patches around. Both are current: Xteink sells them side by side at $69 with the same firmware support. The newest device in the lineup is the Xteink X4 Pro, launched July 21, 2026 at $99.

How do the Xteink X3 and X4 charge?

The X3 charges with a proprietary magnetic pogo-pin cable that is included in the box; the X4 charges over standard USB-C, and no cable is included. Flashing custom firmware over USB needs a data-capable USB-C cable on the X4. If keeping track of a special cable would ruin the device for you, buy the X4.

Sources And Notes

• Official Xteink X3 product page
• Official Xteink X4 product page
• TechCrunch Xteink X3 review
• Liliputing report on firmware flashing restrictions
• Good e-Reader on the firmware lockdown
• Community NFC shortcut example
• Reddit: “Libby on XTEINK X4?” — DRM and app-support discussion
• Mayberry — peer-to-peer DRM-free ebook network