Built a small Nostr-based period tracker for my girlfriend:
Local-first PWA, encrypted on device with a PIN. No servers, backs up and syncs (multi-device support) over Nostr; relays only ever see ciphertext, and the nsec is the recovery key. It supports importing CSV export from Drip on first run.
https://poppy.usenostr.org

Codeberg.org
poppy
Nostr based E2EE period tracker





