Is there another factor restricting them perhaps? When I upload APKs to Google Play, it often deduces extra requirements (such as touchscreen, portrait-mode device).
Maybe some of your users are running Android 2.1 on a device which doesn’t support one of these requirements?
Nope… I have not touched thesdk stuff in ages… Someone just wanted to play with a friend, and their friend does not have it as available on their copy of Google Market or Google Play.
Do you use openGL? I think play filters based on which tectures you support. Also check which countries youve made it available in? I once didnt realize I had “rest of the word except for” a few countries.
With that the market is going to filter out QVGA (less than 320x480). As far as a tablet not being supported, theres lots of cheapo tablets thsat don’t have the official play market on them. I bet its something to do with his “market”.