I use MFP -its generally very good, also quite easy and free
Only problem I find is because it goes across multiple countries and the nutrition data is largely inputted by members there can be a problem in data not being accurate as different countries count carbs in different ways ( some deduct the fibre, others dont)
I find I can unually get around the problem by inputing the name of a uk store in front of the food item ( eg Sainsburys avocado, waitrose cherry tomatoes etc) so that way only the uk entries and data format comes up