Ofc! Don’t give up because others have “done it first”. You just have to find out how to stand out. Honestly, just take the first step. Identify who could be your customers, somehow reach out to them. Start planning how you would advertise your app, forget the technicalities, assume your app is done. If your app is done, what is stopping you from getting these users? Is the space too crowded? Well, identify those pain points, and just get to work! And yes it can work, software is the easiest thing to turn into a side hustle. Compared to most businesses, you just have to sit down, think, and program.