Plus sign does not work.... – Blood Diet Plan - Meal planner Review

Please help!!!! I really like the concept of the app, however, I can not get the plus sign to work so I can add items. I also feel that there should be a search box instead of having to go down the entire list to find an item. Also, how can I change the serving from grams?
Review by Tee@Jay999 on Blood Diet Plan - Meal planner.