The best tasting blueberry jam no pectin required - whether you make it sugar-free or not.
*If you use a liquid sugar-free sweetener such as stevia, add enough to meet your tastes. You may need to reduce the water or add additional guar gum. When using granulated sugar, also add enough to meet your tastes. It will take longer for the crystals to dissolve, but keep stirring until they do.
https://glutenfreerecipebox.com/blueberry-jam-without-pectin/