GTT@home is an alternative to in-clinic oral glucose tolerance testing (OGTT) by enabling this important diabetes test to be performed at home. This app can only be used in the UK and EU with a designated GTT@home test kit. The GTT@home app is used to scan the completed GTT@home tester and send the data to the Digostics cloud, using NFC. The data is checked and the calculated results are sent directly to your healthcare provider.