SeedSigner or Passport, both air-gapped.
SeedSigner
https://seedsigner.com/
Passport
https://foundation.xyz/passport/
/ Emperor Kuzco
npub1c0…z7eru
2024-09-14 18:05:36
in reply to nevent1q…y0l6
Author Public Key
npub1c0qr8hw0vz4mfhd6utllz35g9gjvt20ttvx902au0p5eptztur9qvz7eruSeen on
wss://relay.damus.io