Yeah, there are Classical Greek text apps as well for android, from automon.
They are Άπαντα series
, which is free, and includes following authors:
Homer, Euclid, Plato, Aristotle, Xenophon, Aristophanes, Pindar, Plutarch, Herodotus, Thucydides, Sophocles, Aeschylus, Isocrates, Ermes Trismegistus, Epicuros, Lysias, Aeschines, Parmenides, Epictetus, Hyperides, Polybios, Gorgias, Anacreon, Arrian, Hippocrates, Demades, Plotinus, Menander, Demosthenes, Theocritus, Andokines, Euripides.
For example, the Homer texts are available in the app " Όμεηρος (Άπντα) ".
While the app names and menus are monotonically written modern Greek, The texts are fully polytonic, in classical Greek.