I really like to code, but within University and the global situation, time I can spend is always less, and it takes a lot of time to create an application: InternetRadioPlayer for harmattan counts, for example, over 4500 lines of code (qml and cpp side).
Not everyone likes to pay for apps, so I try to provide both a free version (with ads) and a paid one. For the free one I'm trying not to annoy the user, right now ads come every 10mins, and they stop showing after clicking one.