Muon Tracker does not collect, store, or transmit any personal data.
This privacy policy explains how Muon Tracker (the "App") handles information. In short: the App runs entirely on your device and does not send any data about you or your usage to us or to any third party.
Arpacore B.V. — Coolsingel 65, 3012 AC, Rotterdam, The Netherlands
Contact email: privacy@arpacore.com
Muon Tracker detects and records muon events on your device and displays information about them. The App uses your device's GPS location and accelerometer to compute muon flux density and simulated trajectories. All detection, sensor reading, and data generation happens locally on your iPhone or iPad.
The App has no user accounts, no sign-up, no login, and no user profiles. We do not ask you for any personal information such as name, email address, or payment details.
The App contains no analytics, no advertising SDKs, no crash reporting that transmits data off-device, no cookies, and no tracking technologies of any kind. We do not know who uses the App, when, or how.
Arpacore B.V. does not operate any server, database, or cloud service in connection with this App. The App runs entirely on your iPhone or iPad. It does not use iCloud, CloudKit, or any other Apple cloud service to store or sync user data.
To perform its calculations, the App reads data from two sensors on your device:
iOS will prompt you to grant location permission the first time it is needed. You can revoke or modify this permission at any time in Settings → Privacy & Security → Location Services. If you deny or revoke location permission, the App will continue to function; density calculations and location tagging simply will not be available.
All sensor readings are used exclusively on your device, in real time or for local storage alongside the detection data. No GPS coordinates, accelerometer readings, or derived calculations are ever transmitted to Arpacore B.V. or to any third party.
Any data generated by the App (including detected events, associated locations, computed densities, and simulated trajectories) is stored only on your device. This data is not transmitted to Arpacore B.V. or to any third party.
The App is distributed through the Apple App Store. Apple may collect information related to your download and use of the App independently of us, in accordance with Apple's own privacy policy.
Because no data about you is stored on our servers, there is nothing for us to delete. To remove all App-related data from your device, simply uninstall the App.
The App is not directed to children and does not knowingly collect information from anyone, including children.
Because Arpacore B.V. does not collect or process any personal data through the App, rights such as access, rectification, erasure, restriction, portability, and objection do not practically apply to data held by us — we hold none. If you have any questions or believe this is not the case, you may contact us at privacy@arpacore.com, and you always have the right to lodge a complaint with your national data protection authority.
If the App's behavior changes in a way that affects this policy, we will update this page. You are encouraged to review it periodically. Material changes will be reflected in the "last updated" date below.
Questions about this policy can be sent to privacy@arpacore.com.
Last updated: April 21, 2026