# Privacy Policy
App: BightSize
Effective date: 21 May 2026
Last updated: 21 May 2026
## Summary
BightSize does not collect, transmit, sell, or share any personal information. The app works entirely offline on your device. We have no servers, no analytics, no advertising, and no third-party SDKs that collect data about you.
## Information we collect
**None.** BightSize does not collect any personal information, usage data, device identifiers, location data, contacts, photos, or any other information from you.
## Information stored on your device
BightSize stores the following information **locally on your device only**, using Apple's standard `UserDefaults` system. This data never leaves your device and is not accessible to us or to any third party:
- Knots you mark as favorites
- Your practice log (which knots you've practiced and when)
- Recently viewed knots
- Recent search queries
- Your best quiz scores
This information is included in your iPhone's standard device backup if you have iCloud Backup enabled, in which case it is governed by Apple's privacy policy, not ours. You can clear all of this data at any time by deleting the app.
## Third-party services
BightSize does not use any third-party analytics, advertising networks, crash reporting services, or software development kits that collect user data.
## Tracking
BightSize does not track you across apps or websites, and does not use Apple's Advertising Identifier (IDFA). You will never see an App Tracking Transparency prompt from this app because there is nothing to track.
## Children's privacy
BightSize does not knowingly collect any information from children under the age of 13 (or the equivalent minimum age in your jurisdiction). Because the app collects no information from anyone, this applies to users of all ages.
## Your rights
Because BightSize does not collect any personal information, there is nothing for us to access, correct, export, or delete on your behalf. All app data lives on your device and is under your control. To remove it, delete the app from your device.
## Changes to this policy
If we make material changes to this policy, we will update the "Last updated" date above and, where appropriate, update the policy referenced from the App Store listing before the change takes effect.
## Contact
If you have questions about this privacy policy, you can reach us at:
https://sites.google.com/view/bightsize-privacy-policy/contact-us