Nothing new here. Samourai Wallet has this concept with Sentinel since ages, Monerujo with Sidekicks and Anonero as well.
easy offline signer using an old phone or tablet is a cool concept
supports bitcoin and monero
https://blog.cakewallet.com/meet-cupcake-your-new-secret-weapon-for-crypto-security/
Nothing new here. Samourai Wallet has this concept with Sentinel since ages, Monerujo with Sidekicks and Anonero as well.
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