Thanks to the effective algorithms running in the background, the app can display even millions of people who produce symptoms - all of them in real-time! If there are a lot of people, they will be clustered and displayed as a single person (e.g. one big circle, instead of many small ones).
Track back how the upsurge looked like 14, 10 or 5 days ago so you can predict where will be the next outbreak area.
How many people got infected in total and only in your local area? What is the ratio of the symptoms? You can get answer for these and other questions too.
The voluntarily self-report is just a tap. After it, you'll be visible on the map and you start leaving crumbs behind you (like Hansel and Gretel did). As someone bumps into your crumb, she or he will get notified since it is likely you've infected them. Naturally, it also works in the other way around.