About Android: I don't know.
I couldn't produce a working Android build for v0.6.2R and v0.6.3 because of a library bug. I'm still looking into it but I cannot promise I'll be able to compile a functioning build.
So far, you should be able to play it with Joiplay. But I don't think you'll have any compatibility with saves coming from a native build.
I consider Summer Scent like a PC game. The Mac and eventual Android builds are bonuses. The reason is simple: I cannot be sure that I will be able to produce a Mac or Android build with every release.
The game will never become free. I plan to release it on Steam in a few months.