Maybe you're like me and you're really bad at tracking business expenses. So you create a super simple expense tracker where you can log what you spent, pick a category for that thing, and then see your monthly totals. You could even add a little button to just like save it and send it straight to your accountant. What about a habit tracker? We're just expanding on the water thing. Those annoying little things that we're always trying to build into our routine rather than just sitting at our desk all day. So you could build an app where you check off your daily habits like posted on social media for my business, took a 10 minute walk, actually left my desk and went outside today.