app-bitcoin-new VS sparrow

Thanks for your opnion, mine is backed by documentation https://developers.ledger.com/ and code https://github.com/ledgerhq/app-bitcoin-new

It definitely can, but some assembly will be needed. Typically you can look at how a low level client interacts with the Bitcoin application here https://github.com/LedgerHQ/app-bitcoin-new (check bitcoin_client for python, bitcoin_client_js for js, bitcoin_client_rs for rust) then do your own thing.

That's not planned internally but would be easy for a third party developer to do, since Nostr is only using Schnorr signatures which are already supported by the Bitcoin application (https://github.com/ledgerhq/app-bitcoin-new)

The application has been rewritten from scratch to support Miniscript and new Bitcoin use cases. You can see the new one here https://github.com/ledgerhq/app-bitcoin-new and the old one here https://github.com/ledgerhq/app-bitcoin

It's actually not closed source and even more funny you end up with less hard to check third party dependencies when you run the open source Bitcoin application (https://github.com/ledgerhq/app-bitcoin-new) on a Ledger device.

The caveat is that some of those features are not supported by any frontend yet, but you can find a lot of documentation to implement it in this github issue https://github.com/sparrowwallet/sparrow/issues/471, blog post https://blog.ledger.com/bitcoin-2/ and the application itself https://github.com/LedgerHQ/app-bitcoin-new

You can check the APDU logs using the documentation of the (new) BTC application available at https://github.com/LedgerHQ/app-bitcoin-new/tree/develop/doc - first thing to check would likely be to make sure that you're using the newest version (2.x) of the BTC application since getWalletXpub wasn't present in the old one

Feel free to give us your educated inputs on https://github.com/LedgerHQ/app-bitcoin-new

I don't now if it will help you, but the latest SparrowWallet release lists

Exactly this. Blockstream Jade hardware wallet used with Sparrow wallet on a laptop with linux, to make transactions. Then Bluewallet for a watch-only wallet on your phone device.

Its just well established, open source, well featured. While it is a wallet, here it just plays the role of interface. Yes, there are other apps for this, most notably Sparrow.

Sparrow has the best UI/UX in my experience, and it's completely open sourced. https://github.com/sparrowwallet/sparrow