This is the age of smart phones, the social media and fast internet connections. It follows that many business and social activities happen online and people need applications for some of these activities. If you are thinking about inventing an app or two, you should go for it. Now, you do not need the skills of a world class inventor to create an app of your own. Just look at some of the ones that are currently in use and try to figure out if you can improve on some of the popular apps out there.
In case you cannot add anything to the apps you encounter, you can simply design and create your own from the scratch. Just think about a product that needs an app for better performance. Put on your thinking cap and you might create a world class application. This is how to invent an app.