The best smartphone apps are based on the freemium model, which allows some level of game play or usage without having to purchase. But this also means that you have to build something with real inherent value. It also has to be highly engaging if people are even going to consider paying for an in-app purchase. Take the time to really research this money making opportunity before diving in head first.
Working as a freelancer is a great way to make money online from the comfort of your own home. The beauty of freelancing is that you can tailor it to suit your needs. You can freelance for a couple of hours a week in the evenings to help save up for a holiday or some much needed home improvements. Or carve out a full-time job for yourself, giving you a more satisfying work-life balance and enabling you to do the simpler things in life like taking the kids to school. With so many jobs available online, freelancing is becoming more and more popular.
One of the cool things about Google AdSense is that it's so easy to get set up. If you have a blog or website, you can sign up for a free Google AdSense Account. From there, Google will give you a unique code that you will paste onto your website. Google takes it from there, tracking your page views, traffic, and earnings on your behalf. There is no upkeep or maintenance to get this thing going, which makes it a no-brainer if you have a website already.