Allow your users to be the source of data, after all you only need the data from the day before.
Brett Wagner

Thank you! I definitely considered doing something like that, however — the amount of work required to crowd source the data would be significant. There would be a “chicken & egg” problem — the app wouldn’t be useful to first users, and without the first users, there wouldn’t be enough data to make it useful for everyone else — so this would require a fairly large marketing campaign to get off the ground.

But — one day I may still do it :)

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