How do we get from retention to DAU?

The retention curve is defined by a function r(n). When applied to a cohort of installs, the expected number of DAU from that cohort on day n after install is:

DAU_n = r(n) * cohort size

A simple prediction of total DAU by day n after game launch can be constructed by extending this concept over a sequence of overlapping daily install cohorts. Our server-side algorithm does all this heavy-lifting for you, so sit back and relax and smash that submit button.

If you want to grow DAU you have to either improve retention or generate more daily installs (preferably both).