App Development - Personal Role Playing Game

I would like to develop an app that allows individuals to establish goals to achieve over a 40 day sprint that will take their personal characteristics up various levels if they achieve them similar to a character in a role playing game. As an example, I might aim to increase my Strength by doing weights 3 times per week for 40 days and if I am successful my strength goes up by 100 points. If I miss sessions then maybe only 50 points. I might also aim to increase wisdom by completing a course and reading 3 books to level up etc.

The app should allow me to share character profile and my goals with my team mates, or "Tribe" who are participating. If some characteristics are not targeted with goals they can deteriorate.