
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.
- — 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
- — 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


