If you want to get a good idea of how you really spend your day then you have a ton of different solutions to choose from. However, if you'd like to keep that data private, you need to roll your own. Instructables user gramsky shows how to create a system that tracks your movement with an Arduino.

The main feature of the device allows you to track how much time you spend indoors throughout the day, but it also just tracks all of your movement. It uses an Arduino Uno, Arduino WiFi shield, GPS, thermometer, accelerometer, and a few other various tools. As your mother has likely told you for years, spending more time outdoors is good for your health, and this device gives you a better idea of how much time you're actually spending outside. Head over to Instructables to see how to make this for yourself.

Building a device that clips to your belt and tracks how much time you spend inside and outside | Instructables