Apples are a food resource in Genshin Impact that you can find in the wild. They will restore 300 health if you eat them, and are used in recipes like the Satisfying Salad and the Supreme Wisdom.
To find Apples, you will need to find an Apple Tree, and these can be quite rare. We do have the locations of some Apply Trees marked on the maps below for you, in Mondstadt.
Mondstadt Apple Trees
Stormbearer Mountains #1
Stormbearer Mountain #2
Stormbearer Mountain #3
To make harvest Apples easier, you can just hit the tree with your sword to knock them to the ground. You also don’t need to do any special to get them, and no elemental interaction is needed to harvest them.
Farming these spots every couple of days should yield 10 to 15 Apples each time, and it’s a good idea to keep a steady supply of them, as you never know when you might need them.