NIP-55

Android signer apps

NIP-55 lets Android apps ask a separate signer app to approve Nostr actions. This keeps the private key in one trusted app instead of sharing it with every client.

NIP-55 is one of the small agreements that lets different Nostr apps understand the same kind of activity. In everyday terms, it is like agreeing on the shape of a form: once everyone uses the same form for android signer apps, people can move between apps without losing the meaning of what they created.

Read more in the official 55.md NIP document.