Verify Ontario is a free app developed by the Government of Ontario for Android devices. It falls under the category of Utilities & Tools and is designed to help businesses and organizations verify a visitor's vaccination status quickly and securely. The app scans the QR code on an Ontario government-issued vaccine certificate and displays a green checkmark screen if the certificate is valid. In case of any issues, it displays a yellow warning screen, a grey timeout screen, or a red "X" screen.

The app is privacy-protecting as it does not collect any personal information and only collects metrics such as the total number of scans and the aggregate number of valid, invalid, or warning results. It also does not require an internet connection to scan the QR code. However, it will need to connect to the internet periodically to update vaccine or entry requirements. The app requires camera access and is compatible with devices running Android 4.4 or newer.