As I wrote to one person before, if you have a good idea, you should implement it sooner, because after a while you might forget about it or just change your mind about doing it. If you have a good idea for a mobile app, you should contact the developers https://surf.dev/cases/finance-app-for-kids/ . They are the ones who develop the best and most profitable mobile apps. And if you don't have one for profit, at least people will love using it.