Boox Note Air 4 C vs Boox Tab Ultra C Pro
Which is the better pick? We compared ratings from professional reviewers to help you decide.
Quick verdict
Boox Note Air 4 C
Boox Tab Ultra C Pro
Boox Note Air 4 C scores higher with a 4.3/5 average across professional reviews from 3 sources.
The Boox Note Air 4 C is the most flexible e-ink tablet you can buy — it runs full Android so it covers reading (any app), writing (excellent native note tools), and annotation in color. PCMag and Android Central both rate it 4.5/5, the highest in this category. The tradeoff is that color E Ink dims the display versus monochrome rivals, and the Android layer is more moving parts than reMarkable's locked-down purity. Best for people who want one device to replace a Kindle + notebook + tablet.
Strengths
- +Kaleido 3 color E Ink display renders illustrations and highlighted notes in muted color while keeping paper-like contrast for text
- +Runs full Android 13 — any app (Kindle, Notability, OneNote, Kobo) installs from the Play Store, something reMarkable and Supernote fundamentally can't do
- +Built-in front light with adjustable warm/cool temperature for reading in any lighting
- +Excellent handwriting latency with BOOX SuperNote app plus robust PDF and EPUB markup tools
- +Pressure-sensitive stylus included at no extra cost
Watch-outs
- −Color E Ink is dimmer and lower-resolution than monochrome — text is sharper on the reMarkable 2 or Kindle Scribe
- −Android layer adds complexity and occasional performance hiccups that pure e-ink devices avoid
- −Battery life trails single-purpose rivals, especially with color/front-light use and Wi-Fi on
The Boox Tab Ultra C Pro is the maximalist pick — color display, Android app store, keyboard dock, cameras — but reviewers consistently question whether the price premium is earned. PCMag (3.5/5) and TechRadar (3/5) both feel that the Note Air 4 C delivers 90% of the value for 60% of the price. Best for power users who genuinely need the extra horsepower and the laptop-hybrid form factor; most people should step down to the Note Air 4 C.
Strengths
- +Fastest Boox tablet available with a Qualcomm Snapdragon 600-series SoC, 6GB RAM, and 128GB storage — handles multiple Android apps with ease
- +Kaleido 3 color display plus magnetic keyboard accessory turn it into a laptop-replacement form factor
- +Full Google Play Store access like the Note Air 4 C — any Android app runs
- +Two-mic array, speakers, and a 16MP rear camera for document scanning
- +Pressure-sensitive stylus with excellent latency in BOOX Notes
Watch-outs
- −At roughly $900 it's the most expensive tablet on this list — more than twice the reMarkable 2 for a measurably worse writing experience
- −PCMag's 3.5/5 and TechRadar's 3/5 both flag the price-to-value gap and inconsistent performance when many Android apps run at once
- −Keyboard accessory is a paid add-on, and the laptop mode feels compromised compared to any real Windows/iPad setup
Specifications comparison
| Spec | Boox Note Air 4 C | Boox Tab Ultra C Pro |
|---|---|---|
| Screen | 10.3" E-Ink Kaleido 3 | 10.3" E-Ink Kaleido 3 |
| Resolution | 300 ppi (mono) | 300 ppi (mono) |
| Storage | 64 GB | 128 GB |
| Stylus | Pen2 Pro included | Pen Plus included |
| Battery | ~4 weeks | ~6 weeks |
| Weight | 420g | 480g |