Heroes 3 Runner (like similar Doom and Heretic ports from Eltechs based on Eltechs' ExaGear Mobile software:
This game is powered by Eltechs ExaGear engine. Eltechs ExaGear is a mixture of virtualization and binary translation technology that translates in run-time Intel x86 code to ARM one. Along with translation this engine applies sophisticated optimization algorithms to bring high performance experience to end-users.
It requires a ~100 MB cache (downloaded with installation) and entire Windows folder of HoMM3 installed on your Win PC (works with GOG Complete version, by the way). Then all that you need is copy that directory in app's subfolder PUT_HEROES3_HERE and that's all. You may enjoy the game for free for 3 days before app will ask you to purchase a 30 days pass or "full version" to play forever. Cost of "full version" is about 150 rubles (~$4.25) which is blatantly FAIR PRICE for such treasure.