PERCo
Advantages:
Access via smartphone is convenient, since there is no need to carry an access card, which can be lost or forgotten.There is no need to register such pass at the pass office, it can be obtained remotely. Your phone can replace several ID cards, for example, for different branches.
Using a smartphone as a pass almost eliminates possibility that it will be used by someone else. Even if the smartphone falls into the wrong hands, it is first needed to bypass the protection of the phone and run the application in order to get access to the enterprise.
Available in Google Play Store for Android
