# Errly: AI Tutor & Error Book — All Subjects: Scan & Review > All Subjects: Scan & Review (iPhone/iPad app by 奎锋 张.) - Source: https://appshunter.io/ios/app/errly-ai-tutor-and-error-book/id6794799247 (this page in markdown: same URL + `.md`) - Developer: [奎锋 张](https://appshunter.io/developer/1487627883) - Category: Education, Utilities - Price: Free with in-app purchases - Age rating: 12+ - Requires: iOS 15.5 · 165 MB - Languages: American English, French (France), German (Germany), Japanese, Korean, European Portuguese, Chinese (Simplified, China), European Spanish - Released: 2026-09-08 - Data updated: 2026-10-11 - User reviews in markdown: https://appshunter.io/ios/app/errly-ai-tutor-and-error-book/id6794799247/reviews.md ## What is Errly? 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 your Apple account settings. Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Errly Terms of Service: https://errly-60ac8.web.app/terms.html Privacy Policy: https://errly-60ac8.web.app/privacy.html ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Ultra Monthly | $14.99 | per month | | Ultra Yearly | $119.99 | per year | | errly_extras_storage_50gb | $2.99 | per month | | Pro Weekly | $4.99 | per 7 days | | Pro Monthly | $9.99 | per month | | Pro Yearly | $59.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | errly_extras_pdf_export_once | $0.99 | one-time | | errly_extras_pdf_export_unlimited | $4.99 | one-time | | errly_extras_theme_forest | $0.99 | one-time | | errly_extras_theme_midnight | $2.99 | one-time | ## Version history (last 5 releases) ### 3.0.6 — 2026-09-24 What's New: • All 9 subjects in one Error Book: Chinese, English, History, Geography, Politics, and Biology join Math, Physics, and Chemistry — plus create your own custom subjects • Now in 8 languages: French, German, Spanish, Portuguese, and Korean join English, Chinese, and Japanese • Export your Error Book as a Word document — as clean and print-ready as PDF ### 3.0.0 — 2026-09-21 What's New: • All 9 subjects in one Error Book: Chinese, English, History, Geography, Politics, and Biology join Math, Physics, and Chemistry — plus create your own custom subjects • Now in 8 languages: French, German, Spanish, Portuguese, and Korean join English, Chinese, and Japanese • Export your Error Book as a Word document — as clean and print-ready as PDF ### 2.5.0 — 2026-09-14 Smarter answer checking, smoother imports, and a faster start. ANSWER CHECK • Written or explanation-style answers are now sent to self-review instead of being marked wrong. • When Errly can't judge an answer with confidence, you can compare it with the full solution and mark it yourself. • Multiple-choice options always appear in A/B/C/D order. IMPORT & SAVE • PDF import and full-page scan now show step-by-step progress: page converted → recognized → saved. • The batch confirmation screen has a cleaner layout, and answer snippets are unchecked by default so only the problem is saved. REVIEW • The session summary now counts practice-only items correctly and no longer shows "0 problems". PERFORMANCE & FIXES • Faster start-up: ads load only when needed, so you're never stuck on a loading screen. • Fixed an issue where the error book could appear empty right after linking an account. • Clearer subscription page: existing subscribers see "Upgrade to Pro", and the worksheet preview uses your real mistakes. • Stability improvements and crash fixes. Love Errly? A quick review helps other students find it. Feedback: Profile → Send feedback. ### 2.2.0 — 2026-09-10 • First-launch "Try an example" flow: a bundled sample problem shows the full solution walkthrough offline, without any AI call or account. • Redesigned camera screen (corner-bracket framing guide, single/full-page mode switch, gallery shortcut). • Answer checking rebuilt: structured inputs per sub-question, exact symbolic comparison, clear correct / incorrect / incomplete results. • Cloud storage quota indicators for Pro/Ultra (5 GB) with upgrade prompts. • Account deletion now warns subscribers that deleting the account does not cancel an App Store subscription and links to Subscription Management. ### 2.1.3 — 2026-09-08 No release notes. ## Apps similar to Errly | App | Rating | Price | Category | | --- | --- | --- | --- | | [Schulte Table Focus Trainer](https://appshunter.io/ios/app/schulte-table-focus-trainer/id6771820769) | — | Free | Education | | [Task Master：education](https://appshunter.io/ios/app/task-mastereducation/id6782941622) | — | Free | Education | | [AI Solve Quiz: Homework Helper](https://appshunter.io/ios/app/ai-solve-quiz-homework-helper/id6782374678) | — | Free | Education | | [Allo Pablo: AI Homework Helper](https://appshunter.io/ios/app/allo-pablo-ai-homework-helper/id6755651970) | 4.3 (3) | Free | Education | | [Piano 2026 – Learn piano fast](https://appshunter.io/ios/app/piano-2026-learn-piano-fast/id6757377309) | 5.0 (4) | Free | Education | | [AI Math Homework Solver - Sova](https://appshunter.io/ios/app/ai-math-homework-solver-sova/id6761581840) | 4.6 (12) | Free | Education | ## More apps by 奎锋 张 - [初中帮](https://appshunter.io/ios/app/id1487627884) - [小学数学试题练习](https://appshunter.io/ios/app/id6755416953) - [HeartAlly: AI Companion Diary](https://appshunter.io/ios/app/heartally-ai-companion-diary/id6761459437) All apps by 奎锋 张: https://appshunter.io/developer/1487627883 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-11.*