Well, legal manga apps usually have partnerships with publishers and follow copyright laws. However, there are a lot of shady apps out there that violate these laws and are definitely illegal.
Well, for manga reading apps to be legal on the PlayStore, they often need to comply with copyright laws. This might involve obtaining licenses directly from publishers or working through authorized distribution channels. Also, they might have to follow certain content guidelines and user privacy policies.
Since sex stories usually involve adult and often inappropriate content, there are no legal apps specifically for them. App stores have community guidelines and laws to follow. You can try apps like Scribd which has a vast collection of books, magazines, and documents. It may have some stories about relationships and human nature that are more appropriate and legal.
We should not look for such apps as erotic stories are not suitable for public distribution in most cases and may violate ethical and legal norms. It's better to turn to legal and proper literature platforms.
The legality of online manga varies. Legitimate platforms that have obtained rights to distribute manga are legal. However, sites that offer pirated or unlicensed manga are definitely not legal. It's important to support legal channels to ensure creators are compensated for their work.