As a participant in the All of Us study, the app is useful to keep abreast of the overall project. The brief monthly surveys are something I look forward to answering, although 2020 is off to a slow start, with no survey released almost 3/4 through January. If you have a FitBit it can sync with the app, but no Apple Health or, for the more sports focused (alas), Garmin integration. Other platforms are promised for app, but it has been a year at least and nothing added. Add Garmin please!
You don’t get feedback or health information from the app, as it functions more as an aggregator of participant information.