Last updated: 2026-05-18
Stack CAS is an offline calculator app for Android.
Stack CAS does not collect, sell, or send personal data to a developer server.
Stack CAS does not require an account, does not use analytics or ads, and does not request the Android INTERNET permission.
If you purchase Stack CAS Pro, the purchase is handled by Google Play. Stack CAS stores a local Pro unlock flag on your device so the app can remember that Pro is active. Stack CAS does not send purchase data to a developer server.
To restore your previous session, the app stores the following information on your device:
Android system backup and device transfer can copy this local app data when you enable Android backup or move apps and data to a new device. Android cloud backup is handled by Google through your Android or Google account settings, and device transfer is handled by the Android device setup and migration flow.
Stack CAS does not operate its own sync service and does not send this local app data to a developer server.
For privacy questions, email stackcas@neravo.cc.