The Star Apple produces a fruit that is about the same size as an apple. There are two species of Star Apple, one producing a fruit with a deep purple skin, the other a fruit with a light green skin. A single tree can produce hundreds of fruit and indeed, my own Star Apple tree lost two huge branches this year due to the large number of fruit on each branch. Fruit is ready to pick when gently squeezing you can feel the skin has lost a bit of firmness.