Polkadot and kusama respectively have integrated their platform with ledger hardware wallet. After reading documentation I came to know that integrating a blockchain with ledger requires a nano app which will run in ledger and a GUI. Kusama and polkadot prepared their respective nano app and for GUI they used Polkadot UI to connect ledger and perform operations such as transfer and staking as seen on this link. My question is can other substrate based app use Polkadot-UI for connecting ledger and perform operation like Kusama and polkadot. If yes then how can I do that?