this post was submitted on 14 Jul 2026
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cross-posted from: https://lemmy.world/post/49429587

URL for the crowdfunding: https://www.crowdsupply.com/oddly-specific-objects/open-book-touch

Specs:

  • Display: 4.26" e-paper touchscreen, 480 × 800 px, warm + cool frontlight
  • Processor: ESP32-S3 dual-core, Wi-Fi + Bluetooth LE
  • Memory: 16 MB flash, 8 MB PSRAM
  • Formats: EPUB and plain text, no DRM
  • Storage: microSD card slot
  • Interface: USB-C with integrated LiPo charging
  • Dimension: 78 × 120 × 10 mm, about 85 g
  • Open source: MIT-licensed firmware, open hardware (to be released at shipping)

It also has a replaceable 800 mAh battery, I found it cool :)

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[–] zod000@lemmy.dbzer0.com 19 points 17 hours ago (5 children)

I actually just got one of these things (https://www.xteink.com/products/xteink-x4) that has a 4" screen (WITH BUTTONS) for $55 on Amazon and I kinda love it. I think my perfect phone would be something this size with GrapheneOS support and a headphone jack.

[–] oats@piefed.zip 2 points 12 hours ago (1 children)

Read so much about that thing. Make it 100$, give it a backlight and WiFi and I'll buy three...

[–] BigPotato@lemmy.world 1 points 7 hours ago (1 children)

Why not add the backlight without making it $100? It already has WiFi (and a separate worm light if the mood strikes).

[–] oats@piefed.zip 1 points 6 hours ago

I'm fine with it being cheaper as long as it has a backlight lol

Its an essential feature for me, just saying of it would make the device more expensive, so be it

[–] manxu@piefed.social 6 points 17 hours ago (1 children)

I have seen so many videos about this exact reader! I think Switch and Click has one, too. Yep, found it: https://www.youtube.com/watch?v=wKyuLl8A4CY

[–] zod000@lemmy.dbzer0.com 2 points 16 hours ago

I only bought mine because of a post on lobsters.

[–] flandish@lemmy.world 2 points 14 hours ago (1 children)

got an x3 this week. love that i can keep it in my little shirt pocket, etc. reading more already vs scrolling. buttons for the win, really. the bezel left right and top are, imho, perfect.

[–] zod000@lemmy.dbzer0.com 2 points 13 hours ago (1 children)

The x3 is actually slightly newer too, but I was already wary of the 4" size so I went for the x4. It ended up being just fine though.

[–] flandish@lemmy.world 1 points 12 hours ago (1 children)

yeah. my x3 seems to fit fine in my notebook holder next to my 3x5 craft paper notebooks. or shirt pocket. i might change to x4 once they start shipping again but i have already read a bunch on the 3 … its size may work out fine. i daily carry an iphone 15 the small one.. and i think thats similar in size to the x4?

[–] zod000@lemmy.dbzer0.com 1 points 11 hours ago (1 children)

The x4 is smaller than any semi-recent smartphone I am familiar with, but maybe. The x4 is smaller than a 3x5 card, so this has me doubting that the x3 is truly smaller.

[–] hash@slrpnk.net 1 points 16 hours ago (1 children)

Security on android ereaders is definitely disappointing. My Boox palma 2 only supports pins, not passwords. And unfortunately I don't think a pure eink would work for me. The xteink has me curious if you could make firmware to "leech" off grapheneOS' security by doing something like an SMB share to avoid having potentially pirated books unencrypted.

What I'd personally love to see is an X4 sized device with NFC, wireless charging, and Lora for meshtastic.

[–] zod000@lemmy.dbzer0.com 7 points 15 hours ago (1 children)

The x4 doesn't run Android at all, so I don't think GrapheneOS is even remotely on the table. The open source firmware I use on my (https://crosspointreader.com/) does support using Calbre over wifi though.

[–] oats@piefed.zip 1 points 6 hours ago

Opds and kosync, I'm sold :o

[–] Creat@discuss.tchncs.de 1 points 17 hours ago (1 children)

That's also a rather massive price difference what seems to be similar devices?

[–] zod000@lemmy.dbzer0.com 4 points 16 hours ago

I'm impressed for the price, but no way would I have considered paying $150 for it. I was concerned about the size, but I already finished a book on it and it was perfectly fine.