I am an iOS Freelance Developer, and I would highly recommend getting into mobile development. Right now, I am able to pull in $X,XXX/month through freelance projects on the side. On the side, I develop my own apps which will start earning me even more very quickly.<p>If your general goal is to make around $1,000/month with side projects, that is definitely possible!<p>As with most reoccurring revenue models, find a niche. Before you even think about development, do your research. Understand the market you are in. Is your competitor a Google app, or is it an app that hasn't been update in a year that has been getting bad reviews. At least for your first project, find the latter. Read the reviews, find out with keywords are being used, and think about why yours will be better.<p>The App Store is an complex jungle, with Candy Crush being a Lion, and hundreds of thousands being ants. Find a nice spot next to the watering hole and you will be able to bring in a substantial sum each month. If you're happy with the results, iterate and make even more!