Is it possible to work on apps while having a full time job?

Hello everyone,

I have a full time job, but I can dedicate around 28 hours per week outside work to building apps and learning.

I want to know if anyone here managed to grow an app business or make money from apps while working full time.

How long did it take before you saw results?

Is 28 hours weekly enough to make meaningful progress on mobile ios apps?

I’d love to hear real experiences and advice.