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An SDK for building real apps for your Kobo device

1 starsRust

An SDK to build apps for Kobo eReaders

by thepoet·Aug 2, 2026·4 points·0 comments
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AI Analysis

●●●BangerNiche GemWizardryBig Brain

Runs real Rust binaries on eInk with a browser-based layout simulator.

Strengths
  • •Declarative UI layer abstracts framebuffer and touch hardware safely.
  • •Browser simulator matches the device's refresh planner for local dev.
  • •Fourteen demo apps prove the SDK handles complex real-world use cases.
Weaknesses
  • •Currently limited to Kobo Clara BW; other devices need community PRs.
  • •Niche hardware audience limits widespread adoption potential.
Target Audience

Rust developers and eReader enthusiasts

Similar To

Plato · KOReader

Post Description

Hey HN,

I built an SDK to help me create apps I wanted on my Kobo. My Kobo device has a single core <1GHz processor and 512MB RAM, much less than a Raspberry Pi, but the eInk display and larger battery life opens up a lot of use cases.

I have since used it to build an approval sidekick for my Mac's Claude code and codex, a Hacker News Client for Kobo, a Gutenberg reader, an RSS search and reader and more. All the code is in the repo.

If you have a different device than mine (Clara BW) would love for you to test it on your device and submit a PR to enable this for more device profiles.

Thanks.

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