Fruit needs to be eaten in moderation like any food. It's nature's dessert. You can have it every day of course, preferably outside of meals.
You should eat it outside of meals because fruit is digested quite fast, faster than grains, protein, and fat. Faster than simple vegetables like a normal salad.
If you eat it with meals, it will rot in your stomach before it's digested, so you won't get the full benefits of it. This is a mistake many Italians do. My paternal grandmother for example was obsessed with eating a lot of fruit at the end of lunch and dinner. She never looked healthy nor in shape, because she couldn't access the full benefits of fruit.
The thing is that many fruits are rich in antioxidants: that helps you keep young. Just eat them at outside of meals. Similarly, there's very vegetables that are rich in antioxidants.
Berries are the top sources of antioxidants, particularly anthocyanins. Blueberries, blackberries, raspberries, strawberries, cranberries...
Apples are great for antioxidants too, and should be eaten with the skin on.
Cherries, rich in polyphenols. Dark grapes, rich in resveratrol.
Citrus fruits like lemons, oranges, grapefruits... are rich in vitamin C, another powerful antioxidant.
Plums, especially dark plums. Pomegranate, avocado, mango, papaya.