Opal

Opal is an AI study tool for students that turns documents, audio, and YouTube videos into notes, flashcards, quizzes, and practice questions. Free and Opal+ plans available.

AI Notes Assistant AI Education Assistant Homework Helper

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What Opal is

Opal is an AI study tool for students that turns uploaded material into notes, flashcards, quizzes, and practice questions. The site positions it as a personal tutor-style companion for learning faster and remembering more.

Across the site, Opal emphasizes studying from documents, audio recordings, and YouTube videos, then organizing that material into folders, searching it semantically, and reviewing progress over time. The product offers a free tier and a paid Opal+ plan with higher limits and access to additional features.

Core features

AI-powered notes

Summarizes documents into the gist and key details so students can review the main ideas without reading every page in full.

AI-generated flashcards

Creates flashcards from study material to support repeated review and memory practice.

AI-powered active recall

Generates quizzes and practice questions, including assessment questions and specific assessment questions on paid plans.

Albert question answering

Uses an AI assistant named Albert to answer questions about uploaded material and study content.

Study organization

Organizes material with folders, semantic search, usage tracking, and multilingual support for documents in English, Spanish, German, French, Chinese, and more.

Multi-format input

Accepts multiple file types, including .pdf, .txt, .mp3, and .wav, and also mentions support for YouTube videos.

Ways students use Opal

Review written study material
Upload lecture notes, readings, or assignments and get a condensed set of key points to review before class or exams.
Build practice sessions
Turn notes into flashcards and practice questions to test recall after reading or watching course content.
Ask questions while studying
Use Albert to ask questions about the material when a concept needs clarification or a quick explanation.
Keep course materials organized
Organize files by class or assignment, then use folders and semantic search to find the right material again later.
Monitor study activity
Track document usage and performance over time to see which materials have been reviewed and where more practice is needed.

Pros and Cons

Pros

Turns study materials into multiple output types, including notes, flashcards, quizzes, and practice questions.
Supports several input formats, including documents, audio, and YouTube videos.
Includes organization features such as folders, semantic search, and usage tracking.
Offers both a free tier and a paid plan.
Supports multiple languages for imported study materials.

Cons

The free tier has usage limits on documents, Albert questions, and assessment questions.
The site does not provide detailed platform or integration information.
Advanced and beta features are reserved for the paid plan.

FAQ

Does Opal have a free plan?

Opal provides a free tier and a paid plan. The pricing page shows a free option with document, question, and character limits, and an Opal+ plan that removes those limits and adds access to locked and beta features.

Can I cancel my subscription at any time?

Yes. The pricing page says you can cancel by going to Dashboard -> Settings -> Manage Billing.

What kinds of content can Opal work on?

Opal supports uploading documents and also working with audio recordings, YouTube videos, and other files. The homepage also says it can generate notes, flashcards, quizzes, and active recall practice from study material.

How does Opal handle data and payments?

The site says Opal uses OpenAI's GPT-3.5 and GPT-4 models, and that generated notes and information are stored on its servers. It also states that payment information is held securely through Stripe.