But I can already do that using the Apple calendar app. “Log” each event with an entry at the appropriate time on the particular day. And again do that with Siri commands and Shortcuts. Then later mash it up with the Health app’s data, even if like the author of the paper https://www.sciencedirect.com/science/article/pii/S2666281723000057 that I mentioned here in a previous post Personal Dashboards for Self-Tracking Data - #88 by glimfeather some of the data items are repurposed.
I don’t see that as a USP. I don’t use Google products. Neither would see an automatic upload to a companion (anaysis) program running my Macs as a USP.
I already do from the Health app but into XML and thence into CSV and, if I must, using csvkit create a JSON encoded form. From the Calendar app an ics file which with minimal grep-age can be extracted and merged with the Health data.
TL;DR
I am still trying to see what Sink’s USP is and honestly sm not seeing one. Just seeing other ways of doing same things, The wheel does not require imrpovement what is needed is a fundamental change to transportation.