Curio

Free plan AndroidWeb

What Curio is

Curio turns uploaded study material into explanations and practice resources for students. On the web or Android, users can add lecture slides, PDFs, notes, past papers, screenshots, and images. The service provides AI tutoring, recap notes, flashcards, quizzes, and exam-style questions, plus custom mock exams, surprise quizzes, and timed practice. Progress tracking and review reminders support continued study. A YouTube lecture link can produce notes covering its main ideas. Uploaded text can generate vocabulary drills, grammar checks, and quizzes for language study. Curio says documents, notes, and chats stay private and secure and that it does not sell user data. The free plan includes uploads, summaries, flashcards, quizzes, practice tests, and fair daily limits. Super Curio costs $8 a month billed yearly; Ultra Curio costs $21 a month billed yearly and includes the SAT feature.

Who it suits

Curio suits students who want to convert their own notes, documents, images, or lectures into study aids. It also fits learners practicing languages or preparing for exams.

What it does well

Uploads PDFs, slides, notes, and images
AI tutoring, summaries, flashcards, and quizzes
Custom mock exams and timed practice
Free plan available
Web and Android access

What to know first

Free tier has daily limits
iOS app is listed as coming soon
Paid plans are billed yearly

Plans

Plan	Billed and limits	Price
Curio	Free forever · AI tutor for any subject · Upload docs, notes or images · Flashcards, quizzes and summaries · Practice tests · Fair daily limits	Free
Ultra Curio	Billed yearly; $21.00 /month · Advanced AI tutor · Unlimited chat, flashcards, quizzes and tests · Adaptive test difficulty · SAT feature	$21 a month
Super Curio	Billed yearly; $8.00 /month · Advanced AI tutor · Unlimited chat, flashcards, quizzes and tests · Larger file upload limits · Adaptive test difficulty	$8 a month

As curio.to lists them, read 12 Oct 2026. The maker's own page has the final word.

Verdict

Curio combines source uploads with tutoring, revision formats, and practice exams. A free tier allows starting without payment, while yearly paid plans add unlimited learning tools and, on Ultra, SAT access.

Facts from Curio's own pages

Android app: Curio links to an Android app on Google Play and says iOS is coming soon. · curio.to, 12 Oct 2026
Data privacy: Curio’s FAQ says it does not sell user data and that documents, notes and chats stay private and secure. · curio.to, 12 Oct 2026
Developer listing: Google Play identifies the app developer as Educate Online, Inc. and lists a Wilmington, Delaware address. · play.google.com, 12 Oct 2026
Exam practice: The site describes custom mock exams, surprise quizzes and timed practice. · curio.to, 12 Oct 2026
Free tier limit: The free plan has fair daily limits, while paid plans advertise unlimited learning tools. · curio.to, 12 Oct 2026
Headquarters: Wilmington, Delaware, United States · curio.to, 28 Sept 2026
Language study: Curio says users can upload text to create vocabulary drills, grammar checks and quizzes. · curio.to, 12 Oct 2026
Learning tools: Curio offers AI tutoring, explanations, recap notes, flashcards, quizzes and exam-style practice questions. · curio.to, 12 Oct 2026
Progress: Curio tracks progress and reminds users when to review material. · curio.to, 12 Oct 2026
Purpose: Curio turns study material such as PDFs and lecture videos into explanations, practice questions, flashcards and quizzes for students. · curio.to, 12 Oct 2026
SAT access: The Ultra Curio plan includes access to the SAT feature. · curio.to, 12 Oct 2026
Study materials: The site says users can upload lecture slides, PDFs, notes, past papers, screenshots and images. · curio.to, 12 Oct 2026
Support: Curio’s site lists [email protected] as its contact email. · curio.to, 12 Oct 2026
YouTube: The site says users can paste a YouTube lecture link to get its main ideas as study notes. · curio.to, 12 Oct 2026

Where Curio stands on Freedom251

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