Among the major user problems on iPhone that still remain unsolved, which ones do you think an independent developer outside Apple could realistically start tackling today? And if I built a prototype to solve one of them, what would you look for to decide, “This is something real”?

Among the major problems iPhone users still face today, which ones do you think remain genuinely unsolved and could realistically be addressed by an independent developer? If I were to build a prototype around one of those problems, what criteria would you use to judge whether it represents a genuinely meaningful solution? Thank you for any perspective you’re able to share.