// Remove item from array let db = Firestore.firestore() db.collection("Products").document("").updateData(["" : FieldValue.arrayRemove(["89024"])]) // increment value db.collection("Products").document("").updateData([ "field_name" : FieldValue.increment(Int64(3)) ]) // union array db.collection("collection_name").document("document_id") documentRef.updateData([ "field_name": FieldValue.arrayUnion(["element1", "element2", "element3"]) ])