Question: Is there an app that provides detailed book ratings and content warnings to help me make informed decisions about what to read?

If you're looking for an app that offers detailed book ratings and content warnings, The StoryGraph is a top pick. It tracks books in detail, offers insights, uses AI to recommend books, lets you discover books by mood, and offers detailed ratings. It also offers content warnings, a reading journal and the ability to import data from Goodreads. It's available for iOS and Android devices, with a free version and a premium Plus subscription for more features.

Another useful tool is NextThreeBooks, an AI-powered book recommendation service that uses GPT-3 technology to offer recommendations based on your preferences. It offers curated lists of three books based on your interests, so you can be sure you're getting books that are up your alley. The service is designed to be easy to use and helps readers in more than 80 countries find books that are relevant to them.

For a more multilingual experience, BooksAI is a mobile app that uses ChatGPT to offer more than 40 million AI-generated summaries of books in many languages. It also offers AI-recommended books, spoiler-free and spoiler-filled summaries, and celebrity book lists, so it's a good option for readers who want to explore books from other countries or get recommendations.

It doesn't offer ratings or content warnings, but BookAbout is an AI-powered service that lets you search for books by many attributes besides author and genre. It matches your search to a database of more than 500,000 books so you can find books you'll like even when you can't quite put your finger on what you're looking for. The service is good for book lovers and voracious readers looking for something new.