Exposure Radar estimates your exposure to COVID-19, flu, RSV and measles from the places you go, how crowded they are and what CDC wastewater data shows is spreading, and compares your Apple Health vitals with your own baseline.
What it does
Each visit is scored from how long you stayed, the kind of place, how many Bluetooth devices were close by, what the local wastewater says is circulating, how dry the air is and whether you wore a mask. Devices are counted when the app is open during the visit; otherwise it uses your usual count at that place, or a typical number for that kind of place. The daily index is a simple, published formula, and the methodology page shows the whole thing.
On the readiness side, the app reads resting heart rate, heart rate variability, respiratory rate, sleeping temperature, blood oxygen, sleep and steps from Apple Health and compares each day with your own median over the prior two months. When two of the four core markers are off for two days in a row, or three are off at once, it shows a strain signal you can tag with what was going on.
The Plan tab reads your calendar and helps you keep a low-exposure window before the events you want to be well for. Family & Friends sharing publishes your scores through an end-to-end encrypted relay, never your places or raw vitals, so the server stores ciphertext it cannot read.
How it treats your data
Places, vitals and tags are stored on the phone. A few lookups leave it: place coordinates go to Apple Maps, a location rounded to about 1 km goes to Apple Weather and the FCC or the Census Bureau, and a county or state code goes to the CDC. Sharing sends your recent scores, a short headline, whether you have a strain signal and the name you choose, all encrypted on the device; the key travels only in the invite link and never reaches the server.
Where it stands
On TestFlight now, on its way to the App Store through review. Once released, tracking is free and sharing with family and friends is a small yearly subscription after a free first week. Not a medical device.
Exposure Radar is made by Ocean Dweller Media. Questions and bug reports: support@human-memory.ai.