Errly: AI Tutor & Error Book

Turn today’s mistakes into tomorrow’s review.
Errly is an AI error notebook for students aged 13+, from middle and high school to university.
Save questions from homework and tests, understand the steps and practice with your own material.

From daily homework to exam week
After class, save the questions you found difficult and note what went wrong. Before a test, bring them back for focused review. At university, create subjects for your courses and keep problem sets and lecture questions together.

Capture and organize
• Capture handwritten questions: photograph them or write a question directly in the app, then check and edit the recognized text
• Also scan printed questions, import images and PDF pages, or type your question
• Keep multi-page passages and diagrams connected to their questions
• Save the original, your answer, notes and the reason for a mistake
• Correct the detected subject or save as Unclassified for later

Make room for every subject
Math, physics, chemistry and biology include subject-specific guidance and topic organization. Chinese language and literature, English, history, geography and politics are also built in. Create custom subjects for literature, other languages, university courses or professional exams, then organize them with your own labels.

Understand, review and practice
• Follow guided explanations of the reasoning
• Ask follow-up questions with Pro or Ultra; explore another approach when suitable
• Revisit saved questions with flashcards and spaced review
• Generate practice from your mistakes; with Ultra, choose a supported question type, such as multiple choice or short answer, when suitable for the source question
• Find questions by subject, keywords and labels; Ultra adds search by meaning
• With Ultra, build printable worksheets from saved original questions or suitable AI-generated practice
• Export questions and learning reports as PDF or Word, within your export allowance
• Practice on paper with A4 PDFs: advanced templates leave room for working and put solutions on separate pages, with an eligible subscription or export credit

Learn in eight languages
The interface and explanations support English, Simplified Chinese, Japanese, French, German, Korean, Spanish and Portuguese. Choose how you read the explanation while keeping the original question unchanged.

Keep your notebook across devices
With Pro or Ultra, sign in and enable cloud sync to sync subjects, questions, images and progress across supported devices, within your cloud storage allowance. Saved local content remains available offline; AI requests require an internet connection. You can export or delete your data.

AI explanations and generated practice depend on the question and the material provided. Automatic checking is available for supported question types; open-ended answers use reference points and self-review.

Some features require a Basic, Pro or Ultra subscription. Usage and export allowances depend on your plan and purchases. Subscriptions renew automatically unless cancelled. Local prices, billing periods, any trial eligibility and full benefits are shown before purchase. Manage or cancel subscriptions in Google Play.

Errly Terms of Service: https://errly-60ac8.web.app/terms.html
Privacy Policy: https://errly-60ac8.web.app/privacy.html