Mobile device transaction systems and methods

A computer-implemented method, comprising:

• authorizing, by a computer system and based at least in part on a first device token identifying a first application session of a mobile device and a customer token identifying a user, access to the user to the first application session;
• generating and providing, by the computer system and to the mobile device during the first application session, a second device token identifying a second application session;
• receiving, by the computer system and during the first application session, a request from the mobile device;
• generating, by the computer system and during the first application session, an identifier based on the request, the identifier associated with the user;
• and
• approving, based on a comparison of the generated identifier with an existing identifier, the request.

A method, comprising:

• enabling, by a mobile device, access to a client application during a first session based on a first device token identifying the first session and the mobile device and a customer token identifying a user;
• receiving, by the mobile device from a computing system during the first session, a second device token identifying the mobile device and a second session;
• generating, by the computing system in response to a request from the mobile device, an identifier associated with an account of the user;
• receiving, by the mobile device from the computing system during the first session, the identifier;
• providing, by the mobile device, a user interface displayed on the mobile device during the first session;
• and
• receiving, by the client application via the mobile device during the first session, an approval for the request.