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 hello@constellationapp.app.

What Data We Collect, and What We Do Not

Free Users

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

Free users’ data, your habit names and your daily completion records, lives exclusively on your iPhone. 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.

Paid Users (iCloud Sync)

When you upgrade and choose to enable iCloud sync, your data is stored in your personal iCloud account via Apple’s CloudKit private database.

Critical distinction: this is your iCloud, not ours. We have no backend, no database, and no servers. Your habit data is stored end-to-end encrypted in Apple’s infrastructure, associated with your Apple ID, and governed by Apple’s privacy policy. Even Apple cannot read the content of your private CloudKit database. We certainly cannot.

The only data we are aware of at the point of upgrade is what Apple’s App Store tells every app developer when a subscription purchase is made: a non-identifying transaction confirmation. This does not include your name, your Apple ID, your email, or any habit data.

Sign in with Apple (Optional)

Sign in with Apple is offered only when a user upgrades and opts into iCloud sync. It is entirely optional. If you use it, Apple handles authentication. We receive only an opaque user identifier, not your name, email, or Apple ID, and we store nothing server-side because we have no server.

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 data to any party other than Apple (for CloudKit and App Store, for paid users).

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

Free Users

Your data is retained on your device for as long as you keep the app installed. 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.

Paid Users (iCloud Sync)

Your data is retained in your personal iCloud account. You control it through:

  • In-app deletion: “Delete All Data” in Settings removes data from both the device and your iCloud account.
  • iCloud account settings: You can delete Constellation. data from iCloud.com > Manage Storage > Constellation.
  • Cancelling your subscription does not automatically delete your data. It downgrades your access, but the data remains in your iCloud unless you explicitly delete it.

We have no ability to delete your iCloud data on your behalf, because we cannot access it.

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. For free users, delete the app. For paid users, use in-app deletion or delete from iCloud. We hold no personal data independently.
  • Right to data portability: Your habit data is stored locally on your device (free) or in your iCloud account (paid). 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 hello@constellationapp.app. 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: hello@constellationapp.app.

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 hello@constellationapp.app.

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
hello@constellationapp.app

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