Find your why
When creating a new app in an already-saturated market, it’s important to find a differentiating quality that will persuade potential users to choose your product over the others. Don’t add to the clutter of apps already in existence if you don’t feel like your product is adding value in some unique way, even if it’s small.
If it ain’t broke, don’t fix it
If the UI across apps in the same space looks similar, there’s probably a reason for that. Existing product teams have likely already put in the time and research to determine the best way to represent a given feature, and users have likely come to expect it that way. Differentiate where appropriate, but don’t reinvent the wheel just for the sake of doing something new.