Constellation.
Last updated: May 16, 2026 EN | FR

Privacy Policy

Constellation.  ·  Last updated: May 16, 2026

The Short Version

Constellation. is built on a simple principle: your habits are yours. We designed this app so that we have no technical ability to read your data, because we built no system that could. This policy explains that in plain terms.

Who We Are

Changi Kim (“we,” “us,” or “our”) makes Constellation. If you have questions about this policy, contact us at [email protected].

What Data We Collect, and What We Do Not

Your Habit Data

We collect nothing. Not your name, not your email, not your habits, not your usage patterns, not your device ID. Nothing.

Your data, your habit names and your daily completion records, lives exclusively on your iPhone, whether you use the free tier or subscribe to Premium. It does not leave your device. We have no servers to send it to. The app does not make network requests. We cannot see it, access it, analyze it, or lose it in a data breach, because we never have it.

Premium is a paid subscription, but it changes only which features you can use, not how your data is handled. There is no account to create, no sign-in, and no cloud storage. The only thing we ever become aware of is what Apple’s App Store tells every developer when a subscription is purchased: a non-identifying transaction confirmation. It does not include your name, your Apple ID, your email, or any habit data.

Crash Reporting (Optional, Opt-In)

We use Apple’s built-in MetricKit framework, which is part of iOS. If you choose to share analytics with app developers in your iPhone’s Privacy settings (Settings > Privacy & Security > Analytics & Improvements), we may receive aggregated, anonymized crash diagnostics from Apple. This is an Apple system setting you control. We do not use any third-party crash reporting tools.

No Third-Party SDKs

Constellation. contains zero third-party analytics, advertising, tracking, or telemetry SDKs. We use no Google Analytics, Mixpanel, Firebase, Sentry, Crashlytics, AppsFlyer, Branch, Amplitude, Segment, Facebook SDK, or any similar service. There is nothing in the app that sends your habit data anywhere. The only data path to Apple is the App Store purchase flow when you subscribe.

How We Use Your Data

We do not use your data, because we do not have it. Your habit records serve one purpose: powering the features of Constellation. on your device. We do not analyze your habits. We do not train models on them. We do not sell them. We do not share them. We do not monetize them.

Tracking and Advertising

Constellation. does not track you. We do not participate in cross-app or cross-site tracking. We do not serve ads. We will never sell your data to advertisers. We will never build a profile of you for advertising purposes.

Because we do not request permission to track, the App Tracking Transparency (ATT) permission prompt does not appear. If you see it, contact us: something would be wrong.

Notifications

Constellation. does not request notification permissions. We made a deliberate product decision not to send push notifications, including the 11 pm reminders that have become a habit-app cliché. Your relationship with your habits is yours to manage. We will not interrupt it.

Data Retention and Deletion

Your data is retained on your device for as long as you keep the app installed, whether you are on the free tier or Premium. Deleting the app deletes all data. There is nothing on our side to delete.

Within the app, a “Delete All Data” option in Settings performs an immediate, irreversible local wipe of all habit records.

Cancelling your subscription downgrades your access at the end of the billing period. It does not delete your data; your habits remain on your device unless you delete them or remove the app.

Your Rights

For Users in the European Economic Area (GDPR)

Under the General Data Protection Regulation, you have the following rights with respect to personal data:

  • Right of access: You can request a copy of any personal data we hold about you. Because we hold none, we cannot provide any, and we will say so clearly.
  • Right to rectification: If we held inaccurate data, you could ask us to correct it. We hold none.
  • Right to erasure (“right to be forgotten”): You can request deletion of your personal data. Delete the app, or use the in-app “Delete All Data” option. We hold no personal data independently.
  • Right to data portability: Your habit data is stored locally on your device. You have direct access to it at all times; we do not hold it in a form we could “export” to you separately.
  • Right to object: You have the right to object to processing of your personal data. We process none.
  • Right to restriction: You can request that we restrict processing. We do not process personal data.

To exercise any of these rights, contact [email protected]. We will respond within 30 days.

If you are in the EU and believe we have mishandled your data, you have the right to lodge a complaint with your local supervisory authority.

For California Residents (CCPA / CPRA)

Under the California Consumer Privacy Act and California Privacy Rights Act:

  • Right to know: We do not collect personal information about you beyond what Apple processes as part of the App Store purchase flow.
  • Right to delete: See the deletion instructions above.
  • Right to opt out of sale or sharing: We do not sell or share personal information. There is nothing to opt out of.
  • Right to non-discrimination: We do not discriminate based on whether you exercise privacy rights.
  • Right to correct: We hold no personal information to correct.

To make a CCPA request: [email protected].

Children’s Privacy (COPPA)

Constellation. is rated 12+ in the App Store. We do not knowingly collect personal information from children under 13. If a child under 13 uses the free tier, no data leaves their device, so there is nothing to collect regardless. The paid tier requires an Apple ID and an in-app purchase, both of which Apple gate-keeps.

If you are a parent and have concerns, contact [email protected].

Changes to This Policy

If we make material changes to this policy, we will update this document and note the new date at the top. If changes are significant, we will provide notice through the App Store release notes or, if you have opted into MetricKit sharing, in the app itself. We will never retroactively apply less protective data practices to data we previously collected under more protective terms (and in any case, we collected none).

Contact

Changi Kim
[email protected]

This policy is governed by the laws of the Province of Quebec, Canada.