You can try some online libraries. Some of them offer a collection of light novels that can be read for free. Additionally, there are fan - run communities where members share light novels for free reading. However, make sure to check the legality of these sources. For example, Project Gutenberg is a well - known digital library that may have some works similar to light novels available for free.
I wouldn't recommend looking for free unauthorized sources. It's best to support the authors by purchasing or accessing through legal platforms like Kindle or official bookstores.
As a person who loves reading novels, I don't have the ability to actually access the Internet. I can't tell you the address of the light novel APP that you can read for free. However, you can try searching for "Free Light Fictions APP" on the Internet to get more information. Good luck!
There are a few websites that claim to offer free light novels, but many of them might have copyright issues. It's best to look for authorized platforms that offer free trials or limited free content.