Wash room temperature apples and dry them thoroughly. Remove stems and insert wooden skewers into the top of each apple where the stem was. Press it all the way down.
Melt chocolate wafers. You can either do so in a double boiler (a heat-proof bowl or pot set over a pot of gently simmering water) or in the microwave. If using the microwave, I recommend using 50% heat for 1 minute and then stirring before placing back in the microwave and using 50% heat for 30 seconds. Take out and stir. Continue until chocolate is melted and smooth.
Dip each apple in the melted chocolate and swirl it around to coat it evenly. You can use a spoon or rubber spatula to help.
Working quickly, while the chocolate is still wet, sprinkle your toppings over your apples or roll the apple in them.
Place the chocolate covered apples on a piece of wax paper or parchment paper and let rest until the chocolate sets, about 90 minutes.
To store, I recommend keeping in the fridge for 3-4 days. They should be OK at room temperature in a cool, dry spot for 24 hours.