Maybe it is only me, but I see certain categories of online products that seem to be like "copy-paste" and the market is overcrowded by them. (and they repeats in the PH charts too often as well)
They are especially these:
AI writing tools
social media apps (I do not think that something breath-taking can be developed there)
InspireNote is an iOS app designed to help you brainstorm more effectively and creatively. It offers 100+ creative cards to help you approach problems from different perspectives. It is also a lightweight note-taking app where you can capture all your ideas.