mcGraph CAS · Last updated: October 26, 2026
This Privacy Policy explains how Butterfly AI LLC ("we", "us") handles information when you use mcGraph CAS (the "App"), a graphing calculator. The Android package name is com.nspire.calculator. We do not ask you to create an account, and we do not collect your name, email address, phone number, contacts, photos, location, or advertising identifier.
Expressions, results, graphs, and settings such as the angle mode exist only in the App's memory while it is open. The App does not write them to storage, does not keep a history after you leave, and does not include them in a device backup. Closing or uninstalling the App discards them. We cannot see what you calculate.
The App does not include advertising, analytics, crash-reporting, or account services. It does not request permission to use the internet, and it does not send information to us or to any third party. There is no sign-in and no in-app purchase.
Because the App does not collect personal information, we do not use, sell, or share it. The calculator runs entirely on your device.
The App is not directed at children under 13 (or the minimum age in your country), and we do not knowingly collect personal information from anyone, including children.
Depending on where you live (for example under the GDPR or the CCPA/CPRA), you may have the right to access, correct, delete, or object to the processing of your personal information. We do not hold personal information to provide. You can still contact us and we will help.
Calculations stay on your device and are not transmitted. No method of storage is completely secure; the App avoids storing calculator contents at all.
We may update this Privacy Policy from time to time. Changes will be posted on this page with a new "Last updated" date.
If you have any questions about this Privacy Policy, contact us at [email protected].
Related: Terms of Service