use as base for trusted experiment app series
for collecting data from trusted subjects for trusted institutions
unconscious tracking of whether spouse or child has made it home for the night — I was expecting spouse home late one night but fell asleep before she came home. woke immediately at soft sound of approaching footsteps to door — had unconsciously interpreted the sound and pattern of the footfalls and woken at the right time.
nowadays phone location tracking can serve a similar purpose but the informational quality and aim of the results can be quite different — phone location tracking would not aim to alert me as they successfully approached home or give information on how well they approach (safety, state etc) but simply tracks location. possibly combining status from health monitoring (e.g. from watch) could do this — normal approach pattern could be recognisable and used to interpret state.
App that tracks with the sun, or any other user–chosen goal and can plot and predict the same conditions for next year given conditions for this year.
example, special reflections or lighting conditions occurring at certain time of day, that moves with seasons
e.g. light reflections in kitchen window for washing up at 1115 on 20160428
or painting conditions in garden etc