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.
In most cases, they aren't bad. But some poorly developed manga apps might have issues like battery drain, compatibility problems, or security vulnerabilities. So, it's important to choose well-known and reviewed apps.
There are a few. Tachiyomi and Crunchyroll Manga are worth checking out. Tachiyomi is known for its customization options, and Crunchyroll Manga offers simulpubs of ongoing series. It depends on your specific preferences though.
Here are the top ten recommendations for the free reading app rankings:
1. [Book Guest Free Reading app: provides free novel reading. All novel resources are free. There is no need to pay.]
2. Wandoujia's online novel limited-free reading app provided a pure reading experience without the interference of advertisements.
3. Reading app: A free, open-source, ad-free online reading software that supports the definition of book sources.
4. [Everyday Reading Free Reading app: A reading app with a huge amount of book resources.]
There was no clear information about the other top 10 free reading apps.