Where is my data stored?
Entirely on your iPhone. Lumina has no servers and no accounts — your cycle data never leaves your device. See our Privacy Policy for details.
How do I cancel my subscription?
Subscriptions are managed by Apple: open iOS Settings → your name → Subscriptions → Lumina, then tap Cancel. Deleting the app does not cancel a subscription.
My predictions seem off. Why?
Predictions improve with data. Log at least one full period, and add signals like LH tests or BBT for better accuracy. Irregular cycles, recent hormonal changes, and limited history all reduce accuracy — Lumina shows a confidence label so you know how much to trust each estimate.
How do I delete all my data?
Open Profile → Delete All My Data inside the app. Because Lumina keeps no copy on any server, this permanently erases everything.
How do I sync with Apple Health?
Open Profile → Apple Health and enable sync. You can revoke access anytime in iOS Settings → Health → Data Access & Devices.
Can I use Lumina as birth control?
No. Lumina is a wellness tool and is not FDA-cleared for contraception. Do not rely on its predictions to prevent or achieve pregnancy — talk to your healthcare provider about contraception options.
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