RED has clocked in the region of about 23,000 downloads (including updates) and 415 purchases.

I reckon realistically we are sitting at around 2.5-3% conversion rate, which is fairly standard for the games industry.

However, a lot of people download and don't play. Bombsquad was reporting about 33% of downloads being activated. In that case, it may be conservative to multiply your conversion rate by about 1.5x - 2x. However, this is entirely speculative.