Toss apple slices in lemon juice, lime juice, or diluted ascorbic acid
Store them in an airtight container
Press plastic wrap directly onto the surface of the slices
Keep them refrigerated
Submerge the slices in cold water and drain before serving
Use a saltwater or honey-water soak, then rinse well
Add the slices to a sealed bag with minimal air
Choose firmer apple varieties for longer freshness
Cut the slices as close to serving time as possible
Keep the slices away from heat and direct sunlight