It’s so flashy to develop your own app. Even just for pure fun or to test some concept. High school and college students, talented dummies with Youtube lessons, and even grannies - why not. However, the wise thing is to monetize your app if you can.
And there are numerous ways for this. If you have developed your app for iPhone, you can go for a paid model, which is pretty typical for AppStore. However, be ready to invest in the app promotion, including SMM activities and Google ads. With the Android app, you’d better be more creative like subscriptions, paid aids, freemiums, etc. Slowly earning your audience and retaining it, you can achieve outstanding results.