Pixels512 › Niah › Privacy Policy
Niah: Private Period Tracker · Last updated 14 August 2026
The short version. Niah does not collect the data you log. There is no account or server of ours that receives your cycle data. Your records stay on your device unless you choose Apple Health or export/share a copy yourself. We — the developer — cannot see your cycle, your symptoms, your moods or anything else you enter, because none of it is sent to us. The one thing we do receive is Apple's aggregate App Store reporting, which never identifies you and never contains anything you logged; section 3 says exactly what it is.
This policy applies to the iOS app Niah: Private Period Tracker (including its home-screen widgets and its Apple Watch app), published by Pixels512. It does not cover any third-party website or service you may reach by leaving the app.
The app collects nothing. Niah has no analytics SDK, crash-reporting SDK, tracking pixel or telemetry. It makes no network request to us, and we operate no server that could receive your data. We do not sell, share or use your cycle data for marketing.
Specifically, we do not collect, receive, store, sell, rent or share:
We want to be precise rather than flattering here, because "we collect nothing" is often written by developers who still receive a great deal.
Niah is distributed through the App Store, and Apple gives every developer standard aggregate reporting about their own app. We have enabled that reporting. It is produced by Apple, from Apple's own data — not by anything inside Niah — and it can include:
What this reporting never contains: your identity, your device identifier, your contact details, or any of the cycle, symptom, mood, health or pregnancy information you enter into Niah. Apple aggregates it and withholds figures that are too small to be anonymous, so it cannot be traced back to an individual user. Nothing you log in the app is part of it: Niah does not send those entries to Apple Analytics or to us.
You can turn off the device-level part of this for every app you use in Settings → Privacy & Security → Analytics & Improvements.
Everything you enter is written to local storage on your own device, inside the app's private sandbox provided by iOS. It is protected by your device passcode and iOS file-level encryption. It is included in your own iPhone backups (iCloud or encrypted local backup) if and only if you have those enabled — that is a backup of your device made by Apple at your instruction, not a transfer to us.
To keep the home-screen widget current while Niah is closed, the app stores a small cycle snapshot in a shared Keychain item accessible only to Niah's signed app and widget. Keychain items can survive deleting the app. On the first launch after a reinstall, Niah clears that snapshot before it renders or refreshes native surfaces. While Niah is installed, use Delete all data in Settings to clear the snapshot immediately.
You can verify the app's behaviour yourself: put your iPhone in Airplane Mode and use Niah normally. Every feature — logging, predictions, the calendar, insights, reminders, widgets and the Watch app — continues to work, because all of it runs on-device.
Niah can synchronise two-way with Apple Health, and this is entirely optional. It happens only after you explicitly grant permission in the iOS permission dialog, and only for the specific categories you approve.
This exchange happens on your device only, between Niah and Apple's HealthKit store. Health data obtained through HealthKit is never transmitted to us and is never used for advertising, marketing or any use-based data mining. We do not share it with any third party. You can revoke Niah's Health permissions at any time in Settings → Health → Data Access & Devices → Niah on your iPhone. iOS asks for read and write permission separately and will not re-prompt once you have answered, so a category you declined earlier must be re-enabled there.
Important, because it is the one place your data outlives the app: anything Niah writes into Apple Health belongs to Apple Health, not to Niah. Deleting an entry in Niah, or deleting Niah entirely, does not remove the copy in Apple Health — and if you have Health enabled in iCloud, Apple syncs that copy between your own devices. To remove it, delete it in the Health app (Browse → Cycle Tracking, or Profile → Apps → Niah → Delete Data).
Niah lets you export your data to a passphrase-encrypted backup file and import it again later. The encryption passphrase is chosen by you and is never stored by the app or transmitted anywhere. If you lose the passphrase, the backup cannot be recovered — not by you and not by us.
Niah can also produce two other things at your request, and these are not encrypted, because they exist to be read by someone else:
These are generated on your device and are never sent anywhere by Niah. But once you hand any of these files — encrypted backup, doctor report or partner summary — to iCloud Drive, Mail, a messaging app, a printer or another person, it has left the protection of your device. The receiving service's privacy policy applies to it from that point on, and we have no visibility into or control over it. Please treat a doctor report the way you would treat any other medical document.
If you install the Apple Watch app, your iPhone sends it a small snapshot of your current cycle state — such as cycle day, current phase, days until your next predicted period, fertility status and, if you use those features, pregnancy or postpartum status — so the Watch can display it. The snapshot is stored on the Watch so the complication and app still show something when the Watch is out of range of your phone.
This transfer happens directly between your own iPhone and your own Apple Watch over Apple's device-to-device connection. It does not pass through us and it does not touch a server of ours. It contains a summary, not your full history: individual symptom, mood or note entries are not sent. Removing the Watch app from your Apple Watch removes that stored snapshot.
Period reminders are local notifications scheduled on your device by iOS. They are optional, and they are not push notifications: no server is involved and nothing about your cycle leaves your phone in order to deliver them.
Niah gates no feature behind payment. Every capability — fertility and ovulation predictions, advanced insights, widgets, the Apple Watch app and encrypted backups — is available without paying anything.
The app may offer a single optional one-time "supporter tip" that unlocks nothing. If you choose to buy it, the transaction is handled entirely by Apple through the App Store using your Apple Account. We never see your payment details, billing address or Apple Account. We receive only Apple's anonymous, aggregated sales reporting. Apple's handling of that transaction is governed by Apple's Privacy Policy.
Niah is not directed at children under 13, and because we collect no data at all, we do not knowingly or unknowingly collect personal information from children.
Privacy laws such as the GDPR and the CCPA give you rights to access, correct, export and delete personal data that a company holds about you. We hold no personal data about you — only Apple's aggregate, non-identifying store reporting described in section 3 — so there is nothing for us to disclose, correct, sell or delete on your behalf. In practice this means:
Because your entries never leave your device and we operate no server, we have no cycle, health, identifying or contact data to hand over to anyone — including in response to a subpoena, warrant or other legal demand. The only information we could produce is Apple's aggregate, non-identifying store reporting described in section 3, which says nothing about any individual person and contains nothing you logged. We cannot produce what we do not have.
If this policy changes materially, the updated version will be posted at this address with a new "last updated" date. Because the app collects nothing, we do not expect substantive change.
Questions about this policy or about privacy in Niah: suasion.78.hymn@icloud.com.