Peel, slice and dice the apples into smaller pieces. Add them to a bowl, then pour over the melted butter, cinnamon and salt. Toss the apples and the other ingredients until everything is combined.
Preheat the air fryer to 375℉.
Add the prepped apples into the air fryer basket. Cook for 12 minutes and give the basket a shake every 4 minutes.
Once the air fryer apples are done allow them to cool a bit then serve.