The answer
Not automatically. Hardware wallets protect signing keys, but companion apps may query address balances through hosted services and can learn the addresses they are asked to monitor.
What to do next
Read the companion app’s data handling rules and choose own-node or privacy-preserving connection options where available.
Sparrow Wallet
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BitBox Bitcoin hardware wallet
A Bitcoin self-custody device to compare; it does not make on-chain transactions anonymous or prevent address linking.
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Frequently asked questions
Can a safe signing device still leak account metadata?
Yes. Protecting a private key and protecting public wallet metadata are different security goals.