User activity tracking system and device

A system comprising:

• one or more processors;
• a display;
• one or more sensors;
• and
• a memory coupled to the processors comprising instructions executable by the processors, the processors being operable when executing the instructions to:
• determine one or more sensor signals detected by the one or more sensors, the sensor signals being indicative of motion of the system;
• select one of a plurality of activity categories that corresponds to a portion of the sensor signals, wherein each of the activity categories comprises one or more activity types and is characterized by a motion that the activity types in the selected activity category have in common;
• determine one of the activity types in the selected activity category by:
• analyzing the sensor signals with respect to each of the activity types in the selected activity category;
• and
• calculating a probability of each of the activity types based on the analysis;
• and
• display the determined activity type on the display.

One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

• determine one or more sensor signals detected by one or more sensors of a computing device, the sensor signals being indicative of motion of the computing device;
• select one of a plurality of activity categories that corresponds to a portion of the sensor signals, wherein each of the activity categories comprises one or more activity types and is characterized by a motion that the activity types in the selected activity category have in common;
• determine one of the activity types in the selected activity category by:
• analyzing the sensor signals with respect to each of the activity types in the selected activity category;
• and
• calculating a probability of each of the activity types based on the analysis;
• and
• display the activity type on a display of the computing device.