Hi,
with regards to eating fruit, I would say that it depends on your blood sugar response. If your blood sugar stays in
target range when you eat an apple, or a portion of an apple, then you are fine. If i makes you go high, then best to avoid fruits.
Alternative fruits such as berries and kiwi fruit tend to have less blood glucose impact compared to other sweet fruits. Size of serving also makes a difference.
Hope this helps.