Xingchen & Rikka

Xingchen & Rikka are an independent developer duo known for practical tools that help Android power users, developers, and device tinkerers understand and extend platform capabilities. Their apps focus on low-level Android features—permission and attestation tooling, SafetyNet and attestation testing, and a developer-friendly interface to privileged system APIs. They publish concise, utility-first apps that address specific needs rather than broad consumer products.

Their most visible projects include Shizuku, which exposes system-level APIs to apps through a controlled service; Key Attestation Demo, which walks developers through Android Key Attestation outputs; and YASNAC (Yet Another SafetyNet/Attestation Checker), which inspects SafetyNet and attestation responses. Collectively these apps are used by developers debugging device attestation, by ROM maintainers validating implementations, and by technically inclined users verifying device integrity. Support is community-oriented—contactable via [email protected] and an active Telegram group linked from their website.

Xingchen & Rikka’s work is notable for clear documentation, targeted functionality, and responsiveness to platform changes. They maintain lightweight, open-minded projects that adapt as Android’s security and permission models evolve. Rather than pursuing large feature sets, they iterate on accuracy and reliability for the specific developer and power-user scenarios their tools serve.