I've learned by accident that "sugar free" and "no sugar added" can mean something different with different companies.
When Mott's applesauce says "no sugar added" they really mean it. No sugar or sugar substitutes added. When I buy a 6 cup pack, one cup may be nice and sweet. But the next cup came from a different batch and it's rather sour.

They don't put in extra sugar to regulate the taste. So, whatever apples went into making that batch is what you get. But, I'd rather not have the extra sugar.
I thought it would be the same for other canned fruit when I saw labels for "sugar free" canned peaches. Nope, they mean they don't
use sugar, but will use a nasty tasting sugar substitute added to the liquid the peaches are canned with.