I'm developing iOS apps since early 2013. I have some great revenue from it. I learned a lot about Objective-C, App Marketing and Sprite-Kit. I write all my games in Sprite kit. I would happily give tips to anyone for free. I can also offer some well designed, user engaging interface for your games for a reasonable price. I Believe in simple, easy "endless arcade" games, they can generate the more revenue for you as an individual developer. Do not waste your time for big projects. Just use the same awesome interface for different, easy one screen arcade games (you can buy a really great interface from me too, you just have to write your game, I'll provide everything else in this source). Release a game every month and you'll be all right. Try get some friends in some famous iOS blogs in your local country, so they'll post a review of your app. This is the key of success as an individual developer.
Now you read 1 year experience of my past.
I've tried paid games, I've tried big, huge products. They aren't work for individuals. If you would like to know about me our my products, or you need any advice feel free to contact me.