As mobile smart phones are being equipped with multiple radio interfaces and sensors, they are becoming capable of continuously collecting context information related to the users and the environment. This information can be utilized in different applications and services for providing rich, context-aware experiences. In this paper, we present a client-server platform that enables life logging, via mobile context collection, and processes the data so that meaningful higher-level context can be derived. This can then be mashed-up with 3 rd party Internet services, for providing richer social networking and content associations, keeping privacy and security in mind. We present our core use cases, the proposed end-to-end architecture and current implementation, as well as an explorer user interface that visualizes users' life experience.

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