Errly: AI Tutor & Error Book

Ganzhou Yunxiangji Technology

Contains adsIn-app purchases

About this app

Snap a homework problem for a step-by-step AI explanation, or check a whole page of homework before you hand it in. Save your mistakes to your Error Book and review them before the test.
For students 13+ in high school and college: math, physics, chemistry, biology, English, history, geography and more.
Start free, with free solutions and follow-up questions every day.

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. In college, create subjects for your courses and keep problem sets and lecture questions together. Use it as an AI math solver for algebra, calculus and statistics problems, too.

Check your homework
• Photograph or import homework pages, including PDFs, and see which answers look correct, wrong or unclear
• Open the full explanation for any problem, or ask the AI about it
• Add your mistakes to your Error Book in one tap
• AI checking can make mistakes; your teacher’s grading comes first

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 or speak your question
• If a photo shows several problems, tap the one you want explained
• Problem split across two pages? Use Cross-page mode to shoot it in up to three parts and get one explanation
• Save the original, your answer, notes and the reason for a mistake

Make room for every subject
Math, physics, chemistry and biology include subject-specific guidance and topic organization. English, Chinese, 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
• See the answer and a key hint first, then the full reasoning step by step, with formulas, tables, number lines or graphs where they help and your original photo a tap away
• Ask follow-up questions about the whole problem or any step, every day on every plan; Pro and Ultra add more questions and another approach when suitable
• Revisit saved questions with flashcards and spaced repetition
• 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; advanced A4 templates leave room to show your work and put solutions on separate pages, with an eligible subscription or export credit

Learn in eight languages
Use the app and read explanations in English, Simplified Chinese, Japanese, French, German, Korean, Spanish or Portuguese. The original question stays 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 canceled. 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

What’s new

What's new in 3.3.0
• Check homework: snap or import pages, including PDFs, and see which answers look right, wrong or unclear.
• Follow-up questions on every plan, including free, every day. You can also ask by voice.
• Cross-page mode: shoot a problem that spans two pages in up to 3 parts.
• Clearer explanations with tables, number lines, function graphs and better formulas.
• Redesigned Home, Error Book and Review; the camera preview is no longer stretched.