Put cranberries, pineapple juice, applesauce and water in a sauce pan and bring to a boil.
Reduce to medium heat and stir constantly until the cranberries start to explode (about 10-15 minutes).
Reduce to a simmer and add the juice and zest to the cranberry mixture.
Simmer 10-15 minutes and remove from heat.
Cool completely and store in fridge at least 4 hours but preferably overnight before serving.
Notes
This is not as sweet as store-bought versions! Taste at the end of cooking. It is naturally sweet from the fruit juice and applesauce but you can add more honey or stevia to taste if needed.