BOOX Note Air5 C Review

The color e-ink tablet that wants to be your whole desk.

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Bottom line: The BOOX Note Air5 C is a 10.3-inch color e-ink tablet running full Android, which makes it the most flexible device in its category, but it has some key limitations. The Kaleido 3 screen renders 4,096 colors at 150 ppi, enough to make charts, PDFs with highlighting, and marked-up manuscripts really readable (though you won’t mistake it for an iPad). Handwriting feels close to paper and the included Pen3 stylus is good; the 420 g body is comfortable to hold for an hour or. The drawbacks? Color resolution is half the black-and-white resolution, the muted palette takes adjusting to, and Play Store access creates distractions you won’t see with other e-ink devices. It’s also barely different from the Note Air4 C it replaces: same screen, same processor, same memory, same battery. It’s for writers who read and annotate more than they type and want one device rather than three, and who aren’t already holding the previous model.

Scribbright rating: 4 out of 5

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What actually changed

BOOX announced the Note Air5 C in October 2025, and they left the hardware alone. Same 10.3-inch Kaleido 3 panel, same octa-core processor, same 6GB of RAM, same 64GB of storage, same 3,700mAh battery. Everything sits where it always did, down to the fingerprint reader in the power button, so old Note Air4 C cases still fit.

Three things are new. Android 15 replaces Android 13, which matters for device lifespan: an operating system that stops getting security updates on a device you plan to keep for four or five years is a headache, frankly. The Pen3 ships in the box with a compartment in its cap holding three spare nibs, which you appreciate the first time one wears down. And a set of pogo pins on the back connects the optional Magnetic Keyboard Cover, alongside side-mounted buttons for page turns or volume.

On the software side, EinkWise adjusts refresh and color behavior per app instead of making you change settings every time you move from a PDF to a browser. There are AI summarizing tools, an Infinite Notes canvas, and expanded template and tagging options. The April 2026 firmware update added app-specific display optimization and scrollable note pages.

None of that justifies replacing a working Note Air4 C. But justifies buying this one instead of the older model if you’re considering one or the other.

What color actually buys you

I resisted trying out color e-ink for years because I felt it solved a problem I didn’t have. My manuscripts are black text on white. My notes are black ink. I even avoid blue pens (sorry, I’m OCD that way). So adding color to that felt like paying for irrelevance.

But when you think back on marking up 90-page style guide drafts with three colors of highlighter, you begin to appreciate color e-ink. The value lies in how color can be a sorting system you recognize as being a real asset. Yellow for cuts, blue for queries, pink for the sentences that are keepers. On a black-and-white tablet? They’re three shades of gray that all look like the same shade of gray to tired eyes by page 40.

Kaleido 3 delivers color by placing a filter over the e-ink layer. Black-and-white content still appears at the full 300 ppi, while color drops to 150 ppi. Text stays crisp, but large colored areas look a little grainy up close, and the palette is subdued compared to a backlit display. Reds lean toward brick, and blues have a washed, sun-faded quality. With only 4,096 colors to work with, gradients band visibly rather than blending. Artists who care about precise color should keep those limits in mind.

The filter costs you something else worth knowing about. It darkens the page, so the white reads gray and slightly mottled next to a monochrome e-reader, and contrast drops with it. You end up leaving the front light on more than you expected. At full brightness that light is good. At low and mid settings it’s dimmer than it ought to be.

For markup, charts, and color-coded reading, that resolution is totally workable. Jobs that depend on really faithful color belong on another screen.

→ Grab the BOOX Note Air5 C on Amazon

Full Android is the feature…and the flaw

The Note Air5 C runs Android 15, includes Play Store access, and pairs 6GB of RAM with an octa-core processor. I installed Google Docs, Kindle, Libby, Dropbox, and Obsidian without a hitch. If your work already lives in Android apps, you can bring that setup over instead of adapting to a separate ecosystem.

That flexibility is the main reason Androidians (Androidites?) would pick BOOX over a closed system. A Kindle Scribe centers on Kindle reading and notes, while a reMarkable Paper Pro offers a polished, purpose-built experience. The Note Air5 C connects more easily to a workflow you already use, especially if your files are spread across several apps and cloud services.

The same freedom makes distraction easy. I installed Slack within four hours and removed it two days later after catching myself refreshing a channel on a screen that refreshes slowly by design. Anyone shopping for a calm, single-purpose device will need to impose that discipline themselves.

BOOX Super Refresh, or BSR, offers four modes that balance speed and ghosting. The faster settings make web scrolling serviceable, though it never feels as smooth as a conventional tablet. Video will play, but the experience is more curiosity than feature.

Writing on it, and where it makes the most sense

The included Pen3 supports 4,096 pressure levels (yeesh!) and clips magnetically to the side, though the magnet holds more weakly than it should. The writing film has enough texture to keep the pen from skating across the glass. The cap on top hides three spare nibs, which is a genuinely good idea attached to a cap loose enough to pop off in a bag. By my second session, the latency had faded into the background, which is what you want, right?

SmartScribe tidies rough shapes and handles highlights and underlines without constant tool switching. Handwriting recognition is reliable enough for search. Converting notes into polished text depends on how legible your writing is. Mine has suffered after four decades at a keyboard and, well, indifference about cursive.

Long-form typing is a tougher deal. The tablet has dual speakers, a microphone, and USB-C with OTG support, and the new pogo pins on the back connect the Magnetic Keyboard Cover, which BOOX sells separately. The layout is cramped and the cursor still lags fast keystrokes enough to become distracting during sustained drafting. Writers looking for a dedicated e-ink typing device may find the Freewrite Traveler a better option.

I’d use the Note Air5 C for reading, annotation, outlining, and any thinking that benefits from a pen. For a full draft, I’d move back to a laptop or a purpose-built writing device.

Build, battery, and the small things

The aluminum-magnesium body measures 5.8 mm thick and weighs 420 g. Its wider side bezel gives you a comfortable place to grip without triggering stray touches. The tablet feels sturdy and well-finished, with the sort of build quality you ought to expect at this price. The new side buttons for page turns are the kind of thing you don’t think you need until you read one-handed on a train.

The fingerprint reader sits in the power button and recognized me on the first try about nine times out of ten. I also appreciated the front light’s warm and cool settings. Late at night, the warmer tone is much easier to live with than a stark white screen, especially after a day of staring at screen after screen.

The 3,700mAh battery lasted about a week when I read for two hours a day, kept the front light off, and used Wi-Fi sparingly, as some other reviewers recommended. With the light on, Wi-Fi connected, and a browser activated, I was charging every two or three days. Because the color filter darkens the page, you’ll reach for that light more often than you would on a grayscale device. Your mileage will vary based on how often you ask it to behave like a regular Android tablet.

The microSD slot is easy to overlook, but it’s pretty essential if you keep a large PDF library offline. The built-in 64GB is reasonable, and expandable storage gives you room to grow without juggling files.

Who it’s for

The Note Air5 C makes the most sense for people who spend their days reading and marking up long documents: editors, academics, lawyers, researchers, and anyone else with a steady stream of PDFs. It also suits readers who want Kindle books, cloud storage, and handwritten notes on a single device. If color coding is part of how you organize information, the display earns its keep quickly.

I’d look elsewhere for a distraction-free writing machine or a sketch tablet with accurate color. Anyone already holding a Note Air4 C should stay put, since the screen, processor, memory, and battery are the same and the case they own still fits. Owners who already have a black-and-white e-ink tablet that covers their needs may also struggle to justify the added cost, especially if color markup is only an occasional part of their job.

Pros

• Android 15 with Play Store, so it fits existing workflows instead of replacing them
• 10.3″ screen is large enough to read PDFs at their intended size
• 300 ppi black-and-white text is sharp and easy on the eyes
• Color coding for markup genuinely speeds up long-document review
• Included Pen3 is good, with a paper-like writing feel and spare nibs stored in the cap
• EinkWise handles per-app refresh and color settings so you stop adjusting them by hand
• Side buttons for page turns, plus pogo pins for the optional keyboard folio
• Warm and cold front light with adjustable temperature
• microSD expansion, still rare in this category
• 420 g and 5.8 mm, comfortable for extended one-handed reading
• Old Note Air4 C cases still fit

Cons

• Almost no hardware change over the Note Air4 C, so upgrading makes little sense
• Color renders at 150 ppi, looks muted next to any backlit display, and bands on gradients
• The color filter darkens the page, so you lean on the front light more than expected
• Front light is dim at low and mid settings
• Pen cap pops off too easily and the side magnet holds weakly
• Play Store access undermines the “focus” argument for buying e-ink
• Not viable for drafting prose with a keyboard; refresh lag defeats fast typing
• Keyboard folio costs extra on a device that already costs plenty
• Battery claims assume light use with the front light off
• BOOX devices rarely discount, so expect to pay full price
• Case and accessories add meaningfully to the total cost

The verdict

The Note Air5 C is one of the most capable e-ink tablets available for reading and annotation. Android gives it room to adapt to different workflows, and even the muted color layer speeds up the kind of document review that relies on highlights, charts, and visual cues. Android 15 also buys it years of security runway the previous model is running out of.

Its open design asks for a little restraint, since the same apps that make it useful can pull your attention in every direction. If you already own the Note Air4 C, skip this one; you have the same hardware. For readers and editors coming from paper, an aging device, or nothing at all, the Note Air5 C offers an unusually complete package.

→ Pick up the BOOX Note Air5 C on Amazon

Michael Semer is a professional writer and editor with 40 years of experience in advertising, B2B content marketing, and digital publishing. He color-codes his manuscript markup in three shades and has never explained the system to anyone else, but he’s working on it with his shrink.

FAQ

How good is the color on the BOOX Note Air5 C?

The Kaleido 3 screen shows 4,096 colors at 150 ppi, roughly half the 300 ppi resolution of black-and-white content. Colors are muted and slightly grainy up close, like a newspaper comics page (remember those?). Fine for highlighting, charts, and color-coded notes. Not fine for illustration or anything requiring accurate color.

Is the Note Air5 C worth upgrading to from the Note Air4 C?

For most people, no. The screen, processor, memory, and battery are the same, and old cases still fit. What you gain is Android 15 and its longer security runway, the Pen3 with its spare-nib compartment, and the pogo pins for the keyboard folio. If this is your first BOOX, get the 5 C. If you own the 4 C, keep it.

Can you write a manuscript on the Note Air5 C?

You can attach the Magnetic Keyboard Cover or pair any Bluetooth keyboard and type into any Android app, but e-ink refresh puts a visible lag between your keystrokes and the screen. Fast typists find it unusable for sustained drafting. It’s built for handwriting, annotation, and reading.

How does it compare to the Kindle Scribe or a reMarkable?

The Note Air5 C offers color and full Android app access; the others are closed systems that do fewer things with more polish. If you want one device that runs your existing apps, BOOX wins. If you want a simpler tool with less to configure, the closed systems are easier to live with.

Does it come with a stylus?

Yes. The BOOX Pen3 is included, supports 4,096 pressure levels, and stores three spare nibs under a cap on the top. It attaches magnetically to the side of the tablet, though the magnet is weaker than it should be. The keyboard folio and magnetic case are sold separately.

How long does the battery last?

The 3,700mAh battery runs about a week on light reading with the front light off. Heavy use with Wi-Fi on, the front light active, and web browsing drops that to two or three days. Because the color filter darkens the page, you’ll use the front light more than on a grayscale device.

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