Paypal has added fingerprint security for money transfers among other new functions in the latest version of its android and iOS app.More online payments can be authorised with biometrics and PayPal says it improved fingerprint scanning for more devices.Logging in to the app via fingerprint scanning for Android and iOS is also a prominent feature of the update.The move is the first biometric step by PayPal since April 2014, when it announced a certified fingerprint-based authentication system for the Samsung Galaxy S5.