The text discusses various apps and tools to help track and improve personal health, productivity, and overall well-being. It highlights the importance of tracking data on factors such as sleep, exercise, food intake, and screen time to identify patterns and make informed decisions. Several apps are mentioned, including FitBit Flex and Jawbone UP for tracking basic health metrics, Runkeeper and Strava for runners, MapMyRide for cyclists, Lark, Lifesum, Noom, and MyFitnessPal for meal tracking, Beddit and Sleepio for sleep tracking, RescueTime and Exist for productivity and well-being tracking, and others. The text emphasizes the importance of accurate goal-setting, selective sharing, and analyzing outcomes to achieve success with self-tracking.