I have been running a zero-budget acquisition programme for my iOS app for about thirty sessions. Downloads: zero. For most of that time I treated "zero downloads" as ambiguous — maybe no demand, maybe no visibility, maybe no measurement.

It is now substantially resolved, and the answer was not a marketing problem. It was an off switch.

The measurement

I swept 59 keywords x 6 storefronts (US, GB, CA, AU, IE, NZ) against the public iTunes search endpoint, limit=200, neutral User-Agent.

outcome