Departure time estimation in a location sharing system

A system comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the system to perform operations comprising:
• extracting a plurality of attendance histograms of a first user at a place, the plurality of attendance histograms comprising an aggregation of attendance records for the first user at the place, the plurality of attendance histograms indicating a probability of the first user being at the place for a plurality of times;
• selecting an attendance histogram from the plurality of attendance histograms of the first user based on location data of the first user;
• determining a predicted departure time of the first user from the place using the selected attendance histogram, the predicted departure time corresponding with a time at which the probability of the first user being at the place is below a departure threshold;
• causing display on a computing device of a second user, a graphical user interface comprising a map depicting a selectable user interface element indicating the place and the predicted departure time of the first user from the place;
• and
• in response to a selection of the selectable user interface element, accessing a communication session between the first user and the second user via a messaging system.

A non-transitory computer-readable storage medium storing instructions that, when executed by one or more processors of a machine, cause the machine to perform operations comprising:

• extracting a plurality of attendance histograms of a first user at a place, the plurality of attendance histograms comprising an aggregation of attendance records for the first user at the place, the plurality of attendance histograms indicating a probability of the first user being at the place for a plurality of times;
• selecting an attendance histogram from the plurality of attendance histograms of the first user based on location data of the first user;
• determining a predicted departure time of the first user from the place using the selected attendance histogram, the predicted departure time corresponding with a time at which the probability of the first user being at the place is below a departure threshold;
• causing display on a computing device of a second user, a graphical user interface comprising a map depicting a selectable user interface element indicating the place and the predicted departure time of the first user from the place;
• and
• in response to a selection of the selectable user interface element, accessing a communication session between the first user and the second user via a messaging system.