PhotoClock: Reliving Memories in Digital Photos as the Clock Ticks in the Present Moment

As digital photos grow exponentially, people need new approaches to engage with their photos over time. We describe our study of PhotoClock, a mobile application that leverages the temporal metadata embedded in digital photos to encourage contemplation of memories bound up in one's photo archive. PhotoClock uses the clock-time of the present moment to re-present one's photos taken around that same time of the day in the past. As time ticks away relentlessly, PhotoClock highlights the ephemeral and ongoing quality of time. We conducted the field study with 12 participants over 8 weeks. Our goals are: (i) to investigate the reflective potential of clock-time as an alternative design approach for supporting memory-oriented photo interaction, and (ii) to explore conceptual propositions related to slowness and temporality. Findings revealed that PhotoClock generated diverse and reflective experiences on participants' life stories. We conclude with implications and opportunities for future HCI and design research.