I should have said the compote is 4 large spoons of sugar per 1kg of fruit. Otherwise the same as jam.
Regarding jam, we usually go 1:3 or even 1:4 on the sugar to make it less sweet, and we add about 150ml of red wine and juice of 1 lemon per 1 kg of fruit. Adds some zest and makes it far less sweet. Cherry or jostaberry jam becomes downright sweet-and-sour. Quite delicious.