There are 7 ranks:
The Power of Cho Giver: The Phan Family
Cho Super Giver:
Cho Better Giver:
Cho Good Giver:
Cho Giver:
Cho Assistant Giver:
Cho Recruit:
You can go up ranks by giving to chobots (once gift is back) or give bugs by playing with chobots. You will only give or play with new chobots under 20 days old.