CrumBLE - A fork of CrossInk that delivers BT support, Collections, Bookshelf, on-demand sleep screen cycling, and more!
Supports X4 (X3 on the way)
Xteink X4 & X3
Beyond the default. Your reader, your way.
Community and official firmwares that change how you read—different interfaces, features, and workflows. Discover alternatives that fit you.
CrumBLE
vcrumble-v3.7.3 X4
11 stars
Last release: May 2026
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Page updated: Jun 3, 2026
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