I did a similar experiment with one of my home grown apples a few days ago.
The apple weighed about 100 grams as eaten, so about 10-15 grams of carbs (half my usual daily total).
Bg before apple, 6.2; after 30 mins, 6.5; 60 mins, 6.5; 90 mins, 5.9; 150 mins, 5.4.
Later, after evening meal, 120...