Why Choose X4 Pro? A Pocket E-Reader for Night Reading and Everyday Carry
Why choose X4 Pro instead of a Kindle, Kobo, or another mainstream e-reader?
The honest answer is not that X4 Pro wins every comparison. It is that it is designed for a different job.
Mainstream e-readers often centre the experience on a larger screen and a built-in store or library ecosystem. X4 Pro centres it on pocket portability, local files, flexible controls, and reading in the small gaps of a normal day. It is for the person who wants an e-reader close at hand during a commute, a queue, a lunch break, a flight, or the final minutes before sleep.
If that is the reading habit you are trying to build, X4 Pro has a clear reason to exist.
The short answer
Choose X4 Pro if your priorities are:
- A 72g, 5.95mm pocket-sized reader.
- A built-in front light with adjustable brightness and warm/cool light.
- A touchscreen for navigation plus physical buttons for page turns.
- Local book transfer through the XTEINK app or USB mode.
- A 16GB microSD card with expansion up to 256GB.
- A focused E Ink device that is easy to carry every day.
Choose a mainstream Kindle or Kobo-style device instead if your first priority is a larger display, a deeply integrated bookstore or library workflow, annotations, audiobooks, waterproofing, or another feature that the X4 Pro product page does not confirm.
1. Pocket size is the product, not a side benefit
Many devices are described as portable because they fit in a bag. X4 Pro aims for a smaller standard: a reader you can keep close enough to use without planning for it.
The body measures 111 × 69 × 5.95 mm and weighs 72g. The display is 4.3 inches. Built-in magnets support compatible phone or everyday-carry setups. Together, those details create a specific use case: the book can be present when you have five or ten unplanned minutes.
That does come with a tradeoff. A 4.3-inch screen shows less content than a six-, seven-, or ten-inch display. Readers who need large pages, detailed layouts, or generous margins may prefer a bigger device. X4 Pro makes the most sense when frequency of carry matters more than maximum screen area.
2. It is ready for both the commute and the bedside
Portability is less useful if the device only works well in ideal light.
X4 Pro adds an adjustable front light with warm and cool settings. In practical terms, that means the reader can move from daylight to an evening train or a dim bedroom without requiring a separate clip-on light.
This is one of the most important differences from X3 and X4. Those models are daylight or available-light readers. X4 Pro is the option for people who like the XTEINK pocket format but do not want their reading time to end when the ambient light does.
The better buying question is simple: where do you read when the day is almost over? If the answer is “in bed,” “on the train home,” or “wherever I can,” the front light has real value.
3. You do not have to choose between touch and buttons
Some readers want physical buttons because page turning is the action they repeat most. Others want touch because menus, settings, and file navigation feel more direct.
X4 Pro includes both.
Use the touchscreen to choose books, open settings, adjust the light, and move through the interface. Use the physical buttons when you are already reading and simply want the next page. That combination is especially relevant on a small device, where one-handed use and direct navigation can both matter during the same session.
The point is not to declare one control method superior. It is to avoid making either one a workaround.
4. Your local library is not limited to fixed internal storage
X4 Pro comes with a 16GB microSD card and supports expansion up to 256GB. Books can be imported through the XTEINK companion app or through USB mode from a computer.
The detailed product specification currently lists EPUB and TXT for documents, JPG and BMP for images, and BIN and XTF for fonts. If your library depends on PDF, MOBI, a specific DRM system, or a store-specific format, confirm compatibility before choosing the device.
This local-file approach is a strength for readers who already organise their own compatible files. It is less suitable for someone who wants every purchase, subscription, library loan, and audiobook to flow automatically through one mainstream account.
5. The companion app adds convenience without turning the reader into a phone
The XTEINK app is positioned as the phone-side hub for books, file transfer, wallpapers, and reading habits. X4 Pro can bind to the app, connect to Wi-Fi, and receive compatible files through Cloud Sync.
That division can be useful: manage content on the phone you already carry, then read on a dedicated E Ink device. The official X4 Pro page also promotes XT-Cloud and additional information features, but buyers should check the current app and firmware for the exact functions available in their region and version.
X4 Pro is not presented here as an Android tablet, a Google Play device, or a guarantee of compatibility with Kindle, Kobo, Libby, or other third-party reading services. “Unlocked firmware” should not be stretched into an app-support promise.
6. Firmware freedom matters to the right buyer
XTEINK currently states that units bought directly from its official website are exempt from third-party firmware restrictions. For readers who care about owning a developer-oriented device without those restrictions, that is part of the product’s appeal.
For most buyers, however, this should remain a secondary reason—not a substitute for checking whether their books will actually open. File compatibility, transfer method, screen size, and reading routine should be confirmed first.
X4 Pro versus a mainstream Kindle or Kobo-style reader
| If your priority is… | X4 Pro is the stronger fit when… | A mainstream alternative may fit better when… |
|---|---|---|
| Carrying it everywhere | You want a 72g, 4.3-inch pocket reader | A bag-sized six-inch or larger device is already easy enough to carry |
| Reading at night | You want adjustable brightness and warm/cool front light | You also need a larger screen or a specific ecosystem feature |
| Controls | You want touchscreen navigation and physical page buttons together | You strongly prefer one familiar interface |
| Book access | You manage compatible local files | You rely on an integrated store, library, subscription, audiobook, or DRM workflow |
| Storage | You value microSD expansion up to 256GB | Fixed storage already covers your library |
| Focus | You want a small, dedicated reading device | You need extensive annotation, apps, or tablet-like functions |
This is not a scorecard. It is a job-fit test.
Who X4 Pro is for
X4 Pro makes sense for:
- Commuters who read in short bursts.
- Bedtime readers who need a built-in front light.
- Travellers who want very little extra weight.
- Readers who like physical page-turn buttons but still want touch navigation.
- People with compatible local EPUB or TXT libraries.
- Everyday-carry users who value a magnetic, pocket-oriented form.
Who should skip it
X4 Pro is probably not the best choice if:
- You mainly read fixed-layout PDFs, detailed comics, or large-format documents.
- You need a specific store, library, DRM, audiobook, or subscription workflow.
- You want a stylus, extensive note-taking, or a large display.
- You require a published waterproof rating.
- You do not want to manage or transfer local files.
Choosing against the device for one of these reasons is not a failure of the product. It means you have identified the job your reader must do.
Verdict
X4 Pro is not trying to be a smaller version of every mainstream e-reader. Its strongest case is narrower and more useful:
It is a 72g pocket reader with a front light for day-to-night use, touch for direct navigation, buttons for repeated page turns, expandable storage for compatible local files, and a companion app for moving content onto the device.
Choose it when the reason you do not read is that your current book or reader is not with you—or cannot follow you into low light. Choose a different device when your priority is a larger page or a specific reading ecosystem.
See the latest X4 Pro specifications and check availability.