Privacy Policy — Nalu

Last updated: October 15, 2026

Nalu is a mood and symptom journal that helps you notice how your cycle, sleep and days affect how you feel, and warns you before your hard days. It was built to work without an account and without servers. This policy explains what that means in practice.

The short version

• Your check-ins, symptoms, notes, notes to yourself, experiments, cycle dates and everything Nalu calculates from them are stored only on your iPhone.
• We don't have servers that receive your entries, and we can't see them.
• No ads, no tracking, no selling or sharing of personal data.
• Data from Apple Health is never used for advertising, never sold and never sent to us or anyone else. The copies Nalu keeps for its analysis are part of your encrypted device backup, if you use one.

Data you enter

Mood, energy, feelings, daily factors (for example "movement" or "work stress"), sleep quality, notes, period start dates and your first name (optional) are saved in a local database on your device. If your iPhone backups are enabled, this data is included in your encrypted device backup, which is controlled by Apple and you.

Apple Health (HealthKit)

If you choose to connect Apple Health, Nalu can read:

• Sleep analysis — to compare your mood after short and long nights;
• Menstrual flow — to find your period start dates;
• State of Mind — to import mood entries you've logged elsewhere.

Nalu can write your daily check-ins to Apple Health as State of Mind entries.

Health data is processed on your device only. It is not transmitted to us or to any third party, not used for advertising or data mining, and not stored in iCloud by Nalu. You can change or revoke access at any time in the Health app → Sharing → Apps → Nalu.

Purchases

Subscriptions are processed by Apple. Nalu uses the RevenueCat SDK to receive anonymous information about purchases (which plan, when, in which country) and anonymous events when the subscription screen is shown, with only the kind of place it was opened from (onboarding, settings or inside the app), so we can understand how the app is doing. RevenueCat receives an anonymous app user ID, these events and transaction data from the App Store — never your health data, check-ins, cycle, mood or notes. See RevenueCat's privacy policy.

Notifications and widgets

Reminders are scheduled locally on your iPhone. Widgets read a small summary (today's mood and cycle day) from storage shared between the app and its widget on your device.

Your control

• Export all your entries as a CSV file: Settings → Your data → Export.
• Delete everything: Settings → Your data → Erase all data, or simply delete the app.
• Entries Nalu saved to Apple Health stay there until you delete them in the Health app.

Not medical advice

Nalu is a self-reflection tool, not a medical device. It doesn't diagnose or treat any condition and must not be used for contraception or to plan a pregnancy.

Children

Nalu is not directed at children under 13 and we don't knowingly collect any data from them.

Changes

If this policy changes, we'll update the date above and describe the change in the app's release notes.

Contact

Questions or requests: nikitachirkun@gmail.com