Quantified self, also known as lifelogging, is a movement to incorporate technology into data acquisition on aspects of a person's daily life, with the goal of improving physical, mental, and/or emotional performance. People collect data in terms of inputs (e.g. food consumed, quality of surrounding air), states (mood, heart rate, skin conductance, blood oxygen levels), and outputs (physical or cognitive performance).
Quantified Self co-founder Gary Wolf has described the movement as "self-knowledge through self-tracking with technology". The widespread adoption in recent years of wearable fitness and sleep trackers such as the Fitbit or the Apple Watch, combined with the increased presence of IoT in healthcare and in exercise equipment, have made self-tracking accessible to a large segment of the population.
Other terms for using self-tracking data to improve daily functioning are self-tracking, auto-analytics, body hacking, self-quantifying, self-surveillance, and personal informatics.
References
- Quantified Self, wikipedia.org