Stress in the body
I love that you have an option for user-defined emotions during the check in, I'd love to see that option extend to the body parts section as well. I'd also suggest adding the jaw to your list of potentially stressed body parts; that's a major area for a lot of people, and listing it might bring users' attention to an area they might otherwise have not considered.
Sometimes I do not feel stressed, and would like a simple way to state it. More positive options in the standard list might be a way to address this: "I feel good!" or "filled with gratitude"...
You guys are doing wonderful work. Thanks so much! ->NB
Also THANK YOU for creating this app, I'm adoring it so far!