Throwing the best apps for mature out to the board because search results on it are useless.
On the best apps, a bio with one concrete detail in it gets more replies than a list of adjectives. Most mainstream apps work fine for mature dating if you set your age range appropriately.
Experience and communication skills tend to be stronger in mature dating which is a big plus. Profile authenticity matters even more in mature dating — people can spot inauthenticity immediately.
Older adults tend to be more straightforward about their intentions which makes filtering much easier.