Download Coldstar

Turn any device into an air-gapped signer. Your key lives in locked memory for ~100 microseconds, signs, then it's zeroed. No proprietary chip. No shipping list. Nothing to leak.

🤖 Android

● Available now

Install the Coldstar Android build directly, or get it through the Seeker dApp Store on your Solana Mobile device.

Download for Android ↓

Also available on the Seeker dApp Store

iOS

◇ Coming soon

The iOS build is in the pipeline. Join the waitlist and we'll email you the moment it ships.

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⟠ View the source — github.com/devsyrem/coldstar

Connect

Sign & zeroize

Ledger. Trezor. Coldcard. Every proprietary wallet eventually leaks the one thing that matters — who holds crypto, and where they live.
The device was never the risk. The company was. Coldstar removes the company.