How did you land on $5.31 for the price on the Android store?
We're currently based in Norway (with part of the team in France). We use the Norwegian price in NOK as basis.
We used to have these nice per-country-almost-rounded-prices, like 4.99$ etc. But the latest European laws affected the Play Store and caused a price change. We didn't really bother trying to round them properly again.
Is the current price really too odd ? ;)