It's prolly a better idea to buy an open source wallet. Or build a Seedsigner.
Discussion
Which one do you use?
If you want to DIY I'd go seedsigner and if you want to buy I've heard great things about the foundation passport. nostr:npub1ugnq57hn8va6xqr5zywy2eunem6c624583vkt0dmv40ep7tnnxkqrr898l