The Polish government has developed the free Home Quarantine app for both iPhone and Android, which allows the police to check that individuals do not break quarantine; those who do may be fined up to PLN 5,000 and also offers support to those who are quarantined. Once users activate the app by entering a phone number and a code sent via SMS, they send a reference photo. Every so often the app sends an unscheduled request for a new photo to be sent within 20 minutes. The system checks both the…