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to answer your questions:
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For the smart widgets you can did into the proposed nip to understand the vision behind it: 
if you have any other questions to tag us if you specific question for the web app @npub19qcn...7xw2 is behind it or the mobile app @Sedd is behind it 🙏
GitHub
NIP-XX: Smart Widgets - Interactive Components for Nostr by Darecjo · Pull Request #2025 · nostr-protocol/nips
This NIP introduces Smart Widgets (Improved version from #1454), interactive graphical components encapsulated as Nostr events (kind 30033), design...