You do not need to have the application running for identification at readers - you just need to have the phone unlocked (or just the display lit - depending on the application settings - Other - Settings - Unlock check during card emulation).

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Requirements
To use the application, you need to have:
- a mobile device running Android 10 or higher,
- NFC turned on,
- a screen lock configured (PIN, biometrics),
- a valid physical VSB-TUO card,
- an active relationship with the university.
If the physical card is blocked, it will also stop working in the mobile device.
The application is not a substitute for the ODISka card and cannot be used in vehicles of carriers participating in the ODIS/IDZK system (e.g. when boarding or during ticket inspection).