Observed arrival · 2026-09-01
SapphicTides: Two Cycles, One Calendar
A forthcoming cycle, mood, and check-in app designed for two people who both menstruate, while remaining useful to one person on their own.
Field notes
The product separates a person’s private notes from information deliberately shared through a partner link, allowing the solo experience to remain complete rather than turning features into invite-only placeholders. Its privacy model is unusually specific for a health-adjacent app: the page says encryption keys remain on the phone, stored dates are hidden behind cryptographic hashes, and account deletion has no recovery window. Release is still waiting on store and company-administration steps.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
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