Otty
Period tracker that sends synced daily guidance to both partners, not just one
Otty maps the cycle into five named phases (Storm/Period, Chill/Follicular, Glow/Ovulation, Zen/Luteal, Pre-Storm/PMS) and sends each partner a different daily message about the same day — one explains what she's feeling, the other tells him what to actually do, like getting the heating pad ready before she asks. It works fully solo too, with shared features waiting quietly until you pair up, and is private by default. The full phase guide, symptoms, and playbooks are printed on the landing page itself, so you can see exactly what the app bases its advice on before downloading.
What holds up
- +Sends each partner a different, specific message about the same day, not one shared feed
- +Works fully solo — shared features stay dormant until you pair with a partner
- +Publishes its full phase guide and playbooks on the site, not just app-store screenshots
Mind the limits
- −iOS only — no Android listing shown for partners on the other platform
- −His side depends on her logging accurately — no benefit if she skips days
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