Abstract: Devices, systems, and methods are provided for user profile management across multiple devices. A method may include determining, by a first device, that the first device is signed into a customer account; determining that the customer account includes a first user profile and a second user profile, the first user profile having first identity data, and the second user profile having second identity data; determining that third identity data for the first user profile is available for presentation, the third identity data based on a user interaction with a second device; determining that the first user profile is enrolled on the first device; presenting the first identity data using the first device; receiving a second user request to access the first user profile; and presenting, using the first device, content based on the second user request and a user preference associated with the first user profile.

Abstract: This disclosure describes, in part, techniques and systems for accurately and efficiently updating applications stored on client computing devices. In some instances, the systems and techniques receive an update from an application developer, but rather than send the update directly to a client computing device that operates the application, the systems and techniques determine one or more difference between the current update and an update previously sent to the client computing device and, thereafter, send a “diff file” indicative of these differences to the client computing device. The client computing device may then use the diff file and the previously received update to re-create the new update. Thus, the systems and techniques are able to update client computing devices while limiting the amount of data sent over a network to these devices.