1. A method comprising: determining, for each sensor of a subset of sensors coupled to a device, a respective rate of power consumption for that sensor; determining, for each sensor of the subset of sensors, a respective accuracy score indicating a degree to which information associated with that sensor is indicative of a given context; for each sensor of the subset of sensors, determining a sensor utility value for that sensor, each respective sensor utility value being based at least in part on the respective rate of power consumption for that sensor and the respective accuracy score for that sensor; identifying, based on the sensor utility value for each sensor of the subset of sensors, a given sensor; receiving information output by the given sensor; determining, based on the information output by the given sensor, a probability that the device is currently within the given context; and determining, by a processor, that the device is currently within the given context when the probability exceeds a predetermined threshold.