How many days between two dates?
Two dates in, the gap between them out. Useful for working out an interval you only have the endpoints for.
Pick both dates. The order does not matter; the gap is the same either way.
Where this runs
Entirely in your browser. The dates you type are never sent anywhere, there is no request behind the answer, and nothing is stored when you close the tab. The same is true of TimeSince itself, which keeps your counters encrypted on your phone with no server in the middle.
Let it keep count for you
TimeSince runs this arithmetic continuously, for everything you track. Free for three counters.
