if i google mapstr is shows a generic tagging app. I don't see any nostr integration at all ? you have to login with a username and password even....
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Nostrmo is a Nostr client designed to be cross-platform and user-friendly, supporting communication and social networking on the Nostr decentralized protocol. Features include: Multi-platform Support, Content Type, Direct & Private Messaging, Long-Form Content, Custom Emojis & Polls, Lightning Zaps, Moderated Communities, Badges & File Sharing, User Metadate Support, Relay Management.