Methods and systems for conducting multi-user interactions on a device using biometric authentication

A mobile device comprising:

• a hardware processor;
• and
• a memory storing a first user profile of the first user but not a second user profile of the second user, the memory further storing a biometric application and a software application including processor executable instructions that when executed by the hardware processor cause the hardware processor to perform;
• receiving, via the software application, a payment processing request;
• in response to receiving the payment processing request, launching the biometric application by sending a biometric request from the software application to the biometric application;
• obtaining, via the biometric application, in response to the biometric request, first biometric information of the first user and second biometric information of the second user;
• verifying, via the software application, that the first biometric information of the first user matches a first user biometric information in the first user profile of the first user;
• sending, via the software application, the second biometric information of the second user to a server;
• receiving, via the software application, in response to the sending, a notification from the server, the notification including a match determination between the second biometric information of the second user and a second user biometric information in the second user profile of the second user;
• and
• processing the payment, via the software application, by splitting the payment between the first user and the second user, based on the verifying of the first biometric information of the first user by the mobile device and receiving the notification including the match determination from the server.