Who-thread found some thread statistics on the sales of games in the Mac App Store (the store that is in the MacOS)? Kind of like a good platform, but there are some doubts about the liquidity. Is it worth to post there your game?
Launched before iOS, but it's gone rotten at all, on Android performance in 1000 times higher in terms of sales. (paid-app)
You can do advertising campaign of existing games to your loved ones and see the conversion rate of clicks to setup, calculate your benefits.
There are services that allow you to monitor the installation of applications on the link, without vadnere sdk into the app, so it important to track in fact any app. Added interesting application, got a link opublikovali it is, got statistics on installations. If interested, I can throw off the links.