SpecTrek for Android is an augmented reality game for Android device. The world is being invaded by Ghosts. It is your task to track down these ethereal entities and catch them before they can do any harm. This application provides an augmented reality ghost hunting game, GPS navigation game, role playing game, and a fitness game. When you start the game, first select the time limit of the game. Short games will keep you busy walking or running from one ghost to another with no pauses, ideal for short sprints and interval training, or for just getting to know the game. Longer games will make you travel some distance between two ghosts so you can use the game more like a long distance training assistant.