Hey Product Hunt! 👋 I built Q-Ledger after realizing the crypto industry has a $250B+ problem hiding in plain sight: lost seed phrases. Hardware wallets are great for signing transactions, but the backup is still a piece of paper in a drawer somewhere. Q-Ledger encrypts your seed phrases with post-quantum cryptography (X-Wing: ML-KEM-768 + X25519) and stores them permanently on Arweave. No servers, no accounts, no subscriptions — just encrypted data on a decentralized blockchain that persists forever. Why post-quantum? NIST finalized new cryptographic standards in 2024. The encryption protecting most crypto today (ECDSA, RSA) won't survive quantum computers. If you're holding crypto long-term, your backup strategy needs to account for that. The app is native iOS with a native Swift implementation of the Arweave transaction protocol — no JS bridges or wrappers. Free tier includes 1 backup. Would love your feedback! What's your current seed phrase backup strategy?

Q-Ledger

Quantum-safe seed phrase backup on Arweave — forever

Quantum-safe seed phrase backup on Arweave — forever