Polkadot Vault is an open-source cold storage wallet solution designed for the Polkadot ecosystem, making it suitable for installation on secondary smartphones with secure elements. Notably, the iPod touch is among the recommended device solutions.

Vault has been integrated into the majority of the Polkadot ecosystem's hot wallets, enabling transactions to be signed via QR code scan while keeping private keys offline.

Its decentralized model enables any new blockchain built on the Polkadot or Kusama networks to easily join by scanning network specifications from the metadata portal via a QR code.

(...) Ledger Users Flock to Polkadot Vault for Secure Crypto Storage Following Major Security Gap – Transform Your Phone into a Hardware Wallet. (...)

(...) Crypto Exodus: Ledger Users Swarm to Polkadot Vault Amidst Security Shake-Up – Turn Your Phone into a Fortified Wallet (...)