I’m afraid that having just an idea might won’t be enough these days - the app game changed a lot. The question is what will you bring to the table besides the idea? It would be a diffrent talk If you would be an expierenced UX/UI Designer and had a well thought out Design ready for devs. Apps like this could easily go above 50 screens - that’s a lot of work. And if you want to break in to that saturated market you need great design + solid marketing skills, ASO etc. Even better if you were an iOS dev yourself (even a beginner one) I’m sure you would find someone with similar skills or even more experienced guys to help you out. Making money takes money and if you don’t have it, you need skills, and if you don’t have those either, well you have time to learn them.