This idea it is really innovative and complex therefore, there is not any patent. However, there are some patents in some of the principles of the health app. Some of them are:
CN105326503A- Human body moisture detection bracelet
US9625441B2- Biological sample measurement device
US20160270736A1- Blood pressure measurement device associated with event
US20100292998A1- System and method for recommending recipes
US9645007B2- System and method for maintaining recipe ratios when measuring ingredients for culinary combinations