Many users download apps based on its AppStore ranking. If you want to get more sales, you have to promote your app and get high rank on AppStore ranking.
In Japan, at last, the biggest mobile phone company, NTT Docomo has been selling iPhone5S since October, 2013. Users can buy iPhone from
top 3 mobile phone companies, NTT Docomo, au and Softbank. So, iPhone’s market share is expanding. It means that the number of iOS devices and required downloads to get high rank are increasing. How many downloads do you need if you want your app to be ranked in App Store ranking in Japan? Actually our app got ranked 1st in March 2014. I made the chart for downloads and rank in AppStore.
Number of downloads are per day (see above chart).
Required downloads changes daily.
Ranking changes every 3 hours.
1st rank requires over 75,000 downloads, and this number is increasing because the number of iOS devices are expanding.
In addition, the reward advertisement price, where developers can buy downloads, is decreasing. 2 years ago, developers bought 1 download / 1USD(100JPY), but now, 1 download / 20-60 cents (20-60JPY). That’s why many developers do reward promotion, and apps on ranking are mostly provided by reward advertisement. So it is difficult to get high rank with no promotion cost.
However some apps are ranked without promotion cost, actually, our app too. Depending on how one approaches things, you can get high rank.