”The median monthly revenue an app generates after 12 months is under $50 USD.
…only 17.2% of apps will reach even $1,000 in monthly revenue, but after they hit that point, the odds of them growing further increase. For instance, 59% of the apps that reach $1,000 will go on to reach $2,500 and 60% of the apps that reach $1,000 will make it to $5,000. But what may be more surprising is that only 3.5% of apps will reach $10,000 in revenue — the figure that an indie developer may need to hit in order to devote themselves full-time to app development or their mobile-first startup.”