Spread prepared apples in single layer on paper towel–lined baking sheet and pat thoroughly until dry with paper towels.
Begin to heat oil in dutch oven over medium-high heat to 350 degrees. (While waiting for oil to reach temperature, follow the next steps.)
In a large bowl: combine flour, granulated sugar, baking powder, salt, cinnamon, and nutmeg.
In a medium bowl: whisk 3/4c cider, eggs, and melted butter until combined.
Add and stir apples into flour mixture. Then add and stir cider mixture until all ingredients are incorporated.
When oil reaches temperature, use 1/3-cup measure to transfer 5 heaping portions of batter to oil. Press batter lightly with back of spoon to flatten. Fry until deep golden brown, 2 to 3 minutes per side. (Adjust burner as necessary to maintain oil temperature between 325 and 350 degrees)
Transfer fritters to wire rack set inside rimmed baking sheet. Bring oil back to 350 degrees and repeat with remaining batter. Let fritters cool 5 minutes.