As has been said by a few people, if you really want to play this on android, then you need to get an app from the play store called "Joiplay" and then make sure to also get "Ren'py plugin for Joiplay" also from the play store. Download "Gomamon trainer" from here as if you were playing on windows and put the folder somewhere Joiplay can access (generally anywhere in your phones primary storage and not an SD), then open Joiplay and click the plus in the bottom right to add a new game. You can set the Name, Version, and icon to whatever you want but make sure that in the section for "Executable File" you select either the "Gomamon Trainer.exe or .py" file and as long as everything works as intended you should be good to go. Hope everything works out and remember you'll have to set it all up again when the next update comes out.
it's really not that complicated, a few steps of setup, sure, but after that it's just open Joiplay and click the game. And it's one app, the second thing is just a plugin to give it support for the engine that "Gomamon Trainer" is made with. You don't have to use it, was just letting you know a means of running it on your phone. The dev had mentioned complications with the android and browser versions in the past, so I offered an alternative "Foolproof" means of accomplishing your request. Apologies that the solution was not sufficient.