You're right. Half of iOS developers and 64% of Android developers are living below the "App Poverty Line"--making less than $500 USD per app, per month.
Several people (a consultant I hired and a few clients) have encouraged me to develop iOS apps. This was based on anecdata, but I eventually convinced a client to hire me to build a simple one as a proof of concept. We found that interest in the app fizzled out fast and I learned that I didn't enjoy standalone business application development much. I didn't rule it out as a hobby though.
Source: http://techcrunch.com/2014/07/21/the-majority-of-todays-app-...
Several people (a consultant I hired and a few clients) have encouraged me to develop iOS apps. This was based on anecdata, but I eventually convinced a client to hire me to build a simple one as a proof of concept. We found that interest in the app fizzled out fast and I learned that I didn't enjoy standalone business application development much. I didn't rule it out as a hobby though.