After being intrigued for a while about it, decided to give it a shot this evening. 

• 1 organic Fuji apple, washed, cored and chopped
• 2 tbsp raisins
• 1 tbsp dried cranberries
• Enough water to just cover

I put everything in a plastic quart container, on top of the fridge, at about 915pm this evening, Day 0.So is that it? Just fruit and water? Nothing else necessary? 

Two questions:

1. how often should I feed it, and what do I feed it? Do I need to feed it on the same kind of intervals as I do for sourdough starters (i.e., 2x per day)?
2. Also, are the effects of refrigerating a fruit water starter the same as sourdough (slowing of yeast & bacterial activity)?