Xteink X3 vs X4: Choose by Carry Style, Not Specs
A practical Xteink X3 vs X4 buying guide based on how people actually use tiny e-readers: pocket carry, reading comfort, phone-back setups, NFC, USB-C, firmware, and Kindle/Kobo expectations.
The Xteink X3 vs X4 decision gets easier once you stop treating it like a normal spec sheet.
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.
Start with the practical answer:
| If you want… | Pick first |
|---|---|
| The smallest possible Xteink | X3 |
| The safer first Xteink for most readers | X4 |
| Longer reading sessions or larger font size | X4 |
| USB-C charging | X4 |
| NFC experiments and phone shortcuts | X3 |
| The most pocketable daily-carry object | X3 |
| The most forgiving mini reader | X4 |
| A full Kindle/Kobo replacement | Probably neither |
That last line matters. Xteink is best understood as a pocket companion reader, not a full-size e-reader replacement for everyone.
The Short Version
Choose the Xteink X3 if your priority is extreme portability. It is the “always with me” model: smaller, lighter, easier to slip into a tiny pocket, and more interesting if you care about NFC or phone automation.
Choose the Xteink X4 if your priority is reading comfort and lower daily friction. It gives you more screen, USB-C, a larger handling surface, and a more forgiving first-Xteink experience.
The cleanest buyer rule is this:
If you are excited by how small the X3 is, buy the X3. If you are worried by how small the X3 is, buy the X4.
Tiny e-readers are emotional objects. The right one is the one you will actually carry and read.
The Real Factors That Matter
The official comparison gives you the hardware outline. The X3 has a 3.7-inch E Ink display, 259 PPI, 58g weight, a magnetic pogo-pin port, and no front light or touchscreen. The X4 has a 4.3-inch E Ink display, 220 PPI, a weight Xteink lists as 77g (hands-on reviews measure closer to 74g), USB-C, and also no front light or touchscreen.
Those numbers are useful, but the buying decision should be framed around daily use.
| Factor | Why it matters in real life | X3 advantage | X4 advantage |
|---|---|---|---|
| Pocket carry | A tiny reader only works if you carry it | Smaller and lighter | Still pocketable, but less invisible |
| Reading comfort | Larger fonts and longer sessions need space | Best for short bursts | Better for longer reading |
| Page turns | Smaller screens mean more frequent page turns | Fine for quick reading | Fewer page turns at similar font size |
| Charging | Cable annoyance changes daily friction | Magnetic pogo-pin cable included | USB-C is easier to live with |
| Phone-back use | People want a reader that travels with the phone | Better size and official wider phone compatibility claim | Magnetic-ready with stick-on rings, but larger |
| NFC and automation | Some owners use NFC for shortcuts and transfer flows | Stronger fit | Not the reason to buy X4 |
| Firmware | Buyers care about CrossPoint and other firmware paths | Check X3-specific support first | More established conversation around X4 |
| First-time setup | New owners want fewer strange decisions | More niche | More forgiving |
Factor 1: Pocketability
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.
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:
| Reading habit | Better fit |
|---|---|
| 2 to 10 minute reading gaps | X3 |
| 20 to 45 minute reading sessions | X4 |
| Small font, dense pages | X3 or X4 |
| Larger font, less eye strain | X4 |
| Novels and simple EPUBs | Either |
| PDFs, comics, dense tables | Neither is ideal |
If someone is already worried that a tiny reader might be too small, the X4 is the safer recommendation.
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.
The practical rule:
If losing a special cable would ruin the device for you, buy the X4.
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:
| Phone-back question | Practical answer |
|---|---|
| Which shape makes more sense on a phone? | X3 |
| Which has the more obvious magnetic accessory story? | X4 |
| Which is guaranteed to work with every phone case? | Neither |
| What should buyers check? | Phone size, case thickness, ring placement, pocket security |
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
- personal access badge experiments where legal and supported
- “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.
The X4 has a larger existing conversation around CrossPoint, CrossInk, Microreader, Papyrix, and stock-firmware limitations. The X3 now has its own firmware story too, but buyers should still check current compatibility and install paths before buying specifically for third-party firmware.
There is also a purchase-channel issue. Reports in 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. 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?
- 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:
| If the reader wants… | Recommendation |
|---|---|
| A main e-reader for novels at home | Kindle/Kobo may still be better |
| A pocket sidekick for short reading gaps | X3 or X4 |
| A more polished bookstore ecosystem | Kindle/Kobo |
| Offline files and tinkering | Xteink |
| Largest comfortable reading area | Not X3, maybe not X4 |
| Less phone use during idle time | X3 or X4 |
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.
The first-time tiny e-reader buyer
Pick X4.
It gives you more screen, USB-C, and a less extreme version of the tiny-reader idea. If you fall in love with the format, the X3 can make sense later as the more specialized carry device.
The everyday-carry minimalist
Pick X3.
If your goal is “I want this in my pocket every day,” the X3 is the cleaner choice. The smaller body is the feature.
The larger-font reader
Pick X4.
The X3 can work, but a larger font means fewer words per page and more frequent page turns. If that already sounds annoying, do not force the X3.
The phone-back experimenter
Lean X3, but test your setup.
The X3 shape makes more sense for this job, but magnetic strength, case thickness, and pocket movement matter. Do not assume the phone-back dream works perfectly with every phone.
The USB-C-only person
Pick X4.
This one is easy. If proprietary cables bother you, the X3 will bother you eventually.
The firmware tinkerer
Check firmware support before choosing.
The X4 has more established community history. The X3 is exciting, but you should verify the current CrossPoint or firmware path for the exact model and purchase channel.
The Kindle/Kobo owner
Pick based on use case.
If you want a pocket companion, X3. If you want a mini reader that feels less constrained, X4. If you want a main polished e-reader, keep the Kindle/Kobo.
The Specs, Side by Side
The recommendation comes first; the specs just confirm it.
| Spec | X3 | X4 |
|---|---|---|
| Display | 3.7-inch E Ink | 4.3-inch E Ink |
| Resolution | 259 PPI | 220 PPI |
| Weight | 58g | ~74–77g |
| Charging | Magnetic pogo pin | USB-C |
| Front light | No | No |
| Touchscreen | No | No |
| Storage | 16GB microSD included | 16GB microSD included |
And the quick reasons not to buy each one:
| Model | Skip it if… |
|---|---|
| X3 | You need USB-C, larger font comfort, or a less niche first device |
| X4 | You want the smallest possible carry, or you specifically want the X3’s phone-back/NFC style |
Final Verdict
The X3 is the better tiny object.
The X4 is the better first recommendation.
That is the whole comparison.
Buy the X3 because you want a reader that almost disappears. Buy the X4 because you want the tiny-reader idea with less compromise. Neither should be sold as a normal Kindle/Kobo replacement. Both make more sense as focused, pocketable reading tools that help you read when your phone would otherwise win.
Sources And Notes
- Official Xteink X3 product page: https://www.xteink.com/products/xteink-x3
- Official Xteink X4 product page: https://www.xteink.com/products/xteink-x4
- TechCrunch Xteink X3 review: https://techcrunch.com/2026/05/03/xteink-x3-review-tiny-magnetic-ereader/
- Liliputing report on firmware flashing restrictions: https://liliputing.com/xteink-blocks-installation-of-custom-firmware-on-some-ereaders-launches-a-new-android-powered-model/
- Good e-Reader on the firmware lockdown: https://goodereader.com/blog/electronic-readers/xteink-is-going-to-block-custom-software
- Community NFC shortcut example: https://www.reddit.com/r/XTEINK/comments/1twznya/i_setup_a_shortcut_so_when_i_tap_my_x3_to_my/
Got an Xteink X3 or X4?
Every guide here is built from real community evidence and hands-on testing — covering setup, firmware, transfer, and the day-to-day of living with a pocket e-reader.
Browse all how-tos