I don't know about your apps, they may be great and 1K a month may be what you consider a great success.
But multiple studies have shown that only a select few make the big bucks:
https://techcrunch.com/2014/07/21/the-majority-of-todays-app...
I still make $1,000 to $2,000 a month from my old apps, without updating them.
I now make over $130k a year (salary + benefits) in my day job doing iOS development, in a city with one of the lowest large city cost of living in the U.S.
Apple just announced they've paid out over $70B to iOS App developers since the store opened. You don't have to be an owner of King or SuperCell to have gotten your share of that money.