To connect the https://www.keet.io/ app with your Umbrel node, first you can generate your TLS certificate and admin macaroon strings
SSH into your node (ssh umbrel@umbrel in a command line)
To print and display your TLS certificate input this command:
xxd -ps -u -c 1000 ~/umbrel/app-data/lightning/data/lnd/tls.cert
For your admin macaroon you can retrieve this directly from the UI via the 3 dot menu > connect wallet > admin macaroon
Or you may also use this command:
xxd -ps -u -c 1000 ~/umbrel/app-data/lightning/data/lnd/data/chain/bitcoin/mainnet/admin.macaroon
Then within the Keet app click on your top right profile icon > configure wallet > Wallets & Transfers > Advanced Settings and copy and paste your strings, it should look similar to this using umbrel.local as your host name with port 8080:
Then once connected it will revert to a balance in satoshis screen under your Wallet & Transfers now…
Enjoy!