This is an example : //Determine whether a face or fingerprint scanner is available on the device. LocalAuthentication.hasHardwareAsync().then((isSupported) => { if (isSupported) { //Determine what kinds of authentications are available on the device LocalAuthentication.supportedAuthenticationTypesAsync().then((type) => { /* 1 : fingerprint 2 : facial 3 : iris recognition (Android only) */ if (type.indexOf(1) !== -1) { … Continue reading expo-local-authentication →