The Xteink X4 makes a sharp promise: carry a real E Ink reader in the space where your phone usually goes. At $69 from Xteink, its 4.3-inch screen and 77-gram body solve the size problem that makes a full-size reader annoying to pack. The catch is equally clear: the X4 strips away the library access, lighting, and software flexibility that make a larger reader easy to live with.
Price: $69
Where to Buy: Amazon
I would choose the X4 when the goal is to make reading easier to start, not easier to manage. If you want one device for Kindle books, library loans, PDFs, notes, and reading in bed, a conventional reader still wins. The X4 earns its tiny footprint by turning the decision into a simple question: will you read more if the reader is always within reach?
The X4 solves the carry problem first
A six-inch reader is portable in the technical sense, but it still asks for a bag, a coat pocket, or a deliberate packing decision. Xteink’s X4 measures 114 by 69 by 5.9 millimeters and weighs 77 grams. That is closer to carrying a passport-sized object than carrying another tablet, and it changes the moments when reading feels available.
The screen measures 4.3 inches and runs at 219 pixels per inch. Xteink uses an E Ink display without a front light or touchscreen, so the X4 needs the same light as a paper book. Page-turn buttons handle the basic interaction. That keeps the interface focused, but it also creates a hard boundary for dark rooms, quick searches, highlighting, and other touch-driven habits.
Xteink describes the X4 as having a “magnetic-ready” design and says it includes stick-on rings for attaching the reader to a phone or another surface. That wording matters. This is not presented as a built-in MagSafe module in the way an iPhone accessory might be. It is an add-on mounting approach that depends on the included rings, proper placement, and the installation guidance in Xteink’s safety instructions. The idea is still useful because it lets the reader piggyback on something you already carry, but it should be treated as an accessory setup rather than native phone compatibility.
The real trade is convenience for control
Xteink says the X4 comes with a 16GB microSD card and supports expansion up to 256GB. It also connects over 2.4GHz Wi-Fi and Bluetooth. Its supported formats include EPUB, TXT, JPG, BMP, and BIN. Those details give it a practical role for DRM-free books, personal documents, and a focused local library. They don’t turn it into a general-purpose reading platform.
Xteink does not appear to list third-party app support in its published materials. That matters more than the storage number. A Kindle, Kobo, or Android reader brings a storefront, a library account, syncing, and a mature search system. The X4 expects you to manage files yourself. You get more control over the device’s quietness, but you also inherit the work of finding, converting, copying, and organizing books.
Lighting decides whether the tiny size helps
The missing front light is the X4’s most obvious daily limitation. A pocket reader can be ready at a bus stop, in a waiting room, or during a short lunch break, but those situations still depend on usable ambient light. At night, the X4 needs a lamp or a separate magnetic reading light. The small body makes that accessory easy to carry, yet the complete kit is no longer as self-contained as a full-size reader.
The screen’s lack of touch also reinforces the paper-book analogy. Page buttons make short reading sessions direct and predictable. They don’t help when you want to select text, adjust a setting quickly, jump through a long document, or use a dictionary. The X4 isn’t trying to make every reading task faster. It is trying to remove the temptation to do anything else.
A full-size reader still wins the library test
The X4 works best when your books already exist as files you can legally load. It makes less sense for readers who rely on Kindle purchases, OverDrive loans, publisher apps, or a large synced collection. Those readers aren’t choosing between a big screen and a small screen. They’re choosing between a managed library and a small computer that asks them to become the librarian.
That distinction separates the X4 from a conventional reader such as the Boox Go 6, which gives Android readers a larger display and access to a broader app ecosystem. TG’s coverage of the Boox Go 6 shows the opposite philosophy: more flexibility, more hardware, and more ways to use the device. The X4 makes the opposite bet by closing doors on purpose.
The battery and storage fit short sessions
Xteink lists a 650mAh battery and up to 14 days of use based on one to three hours of reading per day. That figure is a manufacturer estimate, not an independent endurance result, but the usage model is easy to understand. The X4 targets short, repeated sessions rather than a full week of heavy reading with lights, wireless sync, and app activity running in the background.
The microSD slot gives the device room to carry a large local library without turning the reader into a cloud account. That can be a strength for travel or for readers who want a stable archive. It also means backups, file naming, and transfers sit with the owner. The X4 lowers the hardware burden and raises the organization burden.
Choose the X4 when the friction is starting
Pick the Xteink X4 if your phone keeps winning because it is already in your hand. The X4’s small screen, buttons, local files, and lack of apps create enough distance from notifications to give a book a fair chance. It also fits readers who want an inexpensive secondary device for commuting, travel, or waiting rooms and already keep a DRM-free library.
Skip it if you read mostly at night, borrow ebooks through a library app, depend on Kindle purchases, annotate heavily, or read technical PDFs. A larger illuminated reader costs more, but it also removes the setup work that the X4 makes part of ownership. For those readers, the tiny device adds a second reading system instead of replacing the first one.
What to check before buying
Before buying, decide whether Xteink’s promise of “pure reading” matches how you actually read. The X4 is built around local storage, physical page-turn buttons, and a quiet reading experience with no subscriptions and no notifications. Xteink also lists Xteink app support, but the product page does not present the X4 as a Kindle, Kobo, or Android-style app platform. If you want storefront browsing, library borrowing, cloud sync, and annotation tools to live on the reader itself, this is still the wrong kind of simplicity.
Also think about lighting and storage before treating the X4 as an everyday reader. Because it has no built-in front light, night reading means using a lamp or adding the official magnetic reading light. The microSD card setup is useful, but it also means planning how you will transfer, back up, and organize your files. Finally, treat the 4.3-inch screen as a deliberate focus tool, not a smaller version of a six-inch reader. Xteink lists the X4 at $69, but price and stock can change.
The verdict: pocketability earns the compromise
The Xteink X4 isn’t a smaller Kindle. It’s a focused file reader for people who want the reading object to disappear into their routine. At $69, the hardware asks less money and less pocket space, then asks the owner to accept more manual library work and no built-in light.
I would buy the X4 as a second reader for short, distraction-free sessions, especially if my library already lived in DRM-free files. I wouldn’t use it as my only reader. The X4 is worth the compromise only when pocketability is the feature that gets the book opened.
Price: $69
Where to Buy: Amazon
The X4 earns a place beside a full-size reader, not in its shadow, because it turns carrying the book into the easiest part of the day.
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