Preheat oven to 350 F. Grease 2 muffin pans.
Prepare apples: peel, core and slice, then grate. Set aside.
Combine whole wheat flour, salt, baking powder, baking soda, and cinnamon in a medium mixing bowl. Whisk dry ingredients together well.
Combine eggs, maple syrup, honey, vanilla, and melted butter in a large mixing bowl. Mix wet ingredients well. Add grated apples to wet mixture and mix well again.
While mixing slowly add dry ingredients to wet ingredients until completely combined. Do not over mix.
Evenly pour batter into the muffin pans, filling each about 2/3 of the way up.
Bake in a 350 F oven for 15 - 20 minutes.