InkskyMost e-reader buying guides assume you have 20/20 vision. But if you live with low vision, dyslexia, or need assistive reading tools, the standard advice falls apart. This guide focuses entirely on what matters for accessible reading — no filler about waterproofing or warm light.
The four features that actually matter
1. Font size range
Every e-reader lets you increase font size. But the maximum size varies dramatically:
- Kindle: Goes up to size 14, which is about 28pt on most models. Respectable, but some readers with severe low vision need larger.
- Kobo: Matches Kindle’s range. The interface text also scales, which Kindle’s doesn’t fully do.
- Boox (Android): The winner here. Because Boox runs Android, you can install any reader app — and apps like Moon+ Reader go up to 72pt. This alone makes Boox the best choice for severe low vision.
2. Text-to-speech (TTS)
- Kindle: Has VoiceView, a screen reader that reads everything on screen. It’s functional but clunky — designed for blind users navigating the interface, not for comfortable audiobook-style reading.
- Kobo: No built-in TTS on most models. The Sage and Elipsa have Bluetooth for audiobooks, but not text-to-speech for regular books.
- PocketBook: Built-in TTS on most models. Reads any text file aloud with decent English voices. The only brand that offers this out of the box without jailbreaking.
- Boox: Full Android TTS — install any engine (Google TTS, eSpeak, paid voices). This is the most flexible option for heavy TTS users.
3. Dyslexia-friendly fonts
Kindle includes OpenDyslexic. Kobo includes it plus a few other accessible fonts. Boox lets you install any font file, so you can add Atkinson Hyperlegible (free from Braille Institute) or any custom dyslexia font.
4. Contrast and inversion
- White-on-black mode: Kindle calls it “Dark Mode” and it works well across the interface. Kobo has “Invert Screen” hidden in developer options — functional but not polished. Boox offers system-wide dark mode plus per-app inversion settings.
- Boldness and weight: Kobo lets you adjust font weight on a slider, which is excellent for readers who need heavier strokes. Kindle has a boldness slider too, but with fewer steps.
The verdict: which to buy
| Reader profile | Best device | Why |
|---|---|---|
| Severe low vision (needs 40pt+ text) | Boox (any model) | Unlimited font scaling via Android apps |
| Dyslexia only | Kobo Clara BW | Best boldness control + dyslexia fonts |
| Blind / TTS-dependent | PocketBook | Built-in TTS, no jailbreak needed |
| General accessibility on a budget | Kindle Paperwhite | VoiceView + OpenDyslexic included |
If your needs cross categories — say you want both huge fonts AND good TTS — Boox is the only option that does both well. It costs more, but when reading is your primary access to information, the flexibility is worth it.