BULL Wallet now supports Keystone !
• Use Keystone’s Bitcoin-only firmware
• Connect easily with QR codes
• Stack sats directly to your hardware wallet
• Spend securely with PSBT
100% self-sovereignty. No compromises.
Download BULL : https://wallet.bullbitcoin.com/en
Yes of course, you are able to import watch-only wallets into BULL. Here is a video guide tutorial on how to pair it (but you can also choose to add it as watch-only if you prefer): https://www.youtube.com/watch?v=lWeZZ31lW1Q