In A Scent v1.03b PC&Android

It always is in Documents/INCG_Saves/incg.[gamename]

This folder has a /game folder that works like a PC game folder, you can add ugu.rpy (Universal Gallery Unlocker) and 0x52 Universal Mod, rpa files, patches etc.

If you can't find it in INCG_Saves, I did a cock up and it will be in Documents/Renpy_Saves folder.

Note: This does not apply to official apks, they usually don't have external save location, some do (e.g The Inn). If something asks for external file permission when u first launch it, it should support external save, most of them live in Documents folder.

Check if it is a port that has INCG Menu, if it exists, there is high chance that switching between Multi-Sayer/Scrolling TB will fix it.
Otherwise you can report it and I'll try fixing it or give up :P.

Google play protect sometimes triggers, turn it off or just ignore it and install, it will work.
The reason is that my ports asks for storage permission for external Document folder save, to not trigger it, I have to remove that feature, which is not ok, so there is no way around it.

One other option is playing online, which I now offer in the Play section. This costs somewhat a bit, so I can only keep popular games there.
If Online version is available, there will be link to it in the post.

Walkthroughs I make are usually shitty, Cheats a bit more useful than my Walkthroughs. Gallery Unlock - most useful and predictable at the moment.
Doing incest patches is planned but unsure.