Cobalt

Open-source app platform for Kobo e-readers, with a launcher, app store, SDK and RSS/OPDS support.

PlatformWebfree

Cobalt is an open-source application platform for Kobo e-readers, providing a launcher, an app store, a Rust SDK, and a runtime with capability isolation, including RSS and OPDS client support. It's aimed at Kobo e-reader owners and developers who want to install or build independent third-party apps on their device.

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Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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