A new and distinct Malus domestica Mill. apple tree named ‘Sinfonia’ particularly characterized by having a mid-season ripening time, with high productivity and precocious fruit bearing. The fruit are of big size, with conic shape. The overcolor is light red over green background. The flesh is very firm with fine texture and good juiciness. The flavor is slightly acidic with a global excellent eating quality. The fruit keeps very well on the tree, as well as in cold storage.