Kisi offers flexible and secure methods to access your office — from mobile phones, Kisi Passes, Kisi Tags, or your own existing cards. Depending on your use-case and preference, Kisi gives you flexible yet secure options to access your facility. Hold a phone to the reader, just like a keycard. Using Bluetooth on iPhone and NFC on Android, Kisi's technology updates in real-time on both platforms. Some landlords provide cards that you must use for your building—why carry two? A Kisi Tag sticks to an existing keycard to unlock the Kisi Reader.