Question AI
D3 DIMENSION TECHNOLOGY PTE. LTD. · Leaning · China AI
Question AI is an AI homework helper that turns photos, typed questions, and PDFs into step-by-step answers across math, science, and humanities subjects.
About Question AI
What Is Question AI
Question AI, usually written Question.AI, is a study app from D3 DIMENSION TECHNOLOGY PTE. LTD. You hand it a problem as a photo, a typed question, or a PDF, and it returns an answer with the working laid out underneath. The app launched in May 2023 and runs on the web, Windows, macOS, iOS, and Android.
The pitch is speed on the boring part of homework. Instead of retyping an equation or hunting through a textbook index, you point a camera at the page and read the solution a few seconds later. As an AI homework solver, it puts the emphasis on the working rather than the final number, which matters more for anyone actually trying to learn the method.
The limits show up on the free tier and on the monthly plan. Free users see ads and hit question caps. A monthly subscription is capped at 30 solved questions and 30 image uploads, while only the yearly plan lifts those caps. Answers also get thinner on advanced or niche topics, and a blurry photo of handwriting can send the app down the wrong path.
Getting Started
- Open questionai.ai in a browser, or install the app from the App Store, Google Play, or the Microsoft Store. No account is needed to try a first question.
- Sign in with an email address, Google, or Apple when you want your history to follow you across devices.
- Pick an input method: snap a photo of the problem, type it out, or upload a PDF for the document tools.
- Read the step-by-step answer, then ask a follow-up in the same chat if a line doesn't make sense.
- Save the thread to your history for review later, and upgrade only if you keep running into the question cap.
Product Information
A quick look at Question AI's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- High school students working through algebra, chemistry, or essay prompts
- Early college students in survey courses
- Parents helping with homework they've half forgotten
- Adults returning to study
Tasks
- Solving math word problems
- Checking a finished assignment
- Summarizing a textbook chapter
- Making sense of a dense PDF
Scenarios
- Stuck at 11 pm on a problem set
- Working through a stack of worksheets
- Revising before a test
Key features
Snap and Solve Photo Answers
The camera tool reads printed or handwritten problems and returns a worked solution. It handles equations, diagrams, and word problems, so you don't have to retype symbols that are awkward to enter on a phone. A clear, well-lit photo makes a noticeable difference to how much of the page the app reads correctly.
AI Chat With Follow-Up Questions
After the first answer, the conversation stays open. You can ask why a step works, request a shorter version, or push for an example with different numbers. This back-and-forth is where the app earns its keep, since a static answer key can't explain the part you actually got wrong.
PDF Homework Help and Document Chat
Upload a PDF and ask questions about the content. The app points to the relevant section instead of pulling a generic answer from the web, which is useful for course packets, scanned readings, and teacher-made study guides. Large files take longer to process, and image-only scans depend on how clean the text recognition is.
Summarizer for Textbooks and Notes
The summarizer condenses chapters, articles, and notes into a shorter outline. It's aimed at the review stage rather than the first read, and it works best on well-structured prose. Dense technical writing can lose important qualifiers in the compression.
Subject Coverage From Math to Business
The site organizes support around math, biology, chemistry, physics, history, social science, English, and business. Math is the strongest area by a wide margin, particularly algebra and calculus. Humanities answers are fine for factual recall and weaker on argument and analysis.
One Account Across Web and Mobile
The same account works in a browser, on Windows and macOS, and on iOS and Android. Start a question on a laptop and finish reading the steps on a phone. The mobile app also stores recent answers for offline review, which makes it a usable AI study assistant on a commute with no signal.
Pros and cons
Pros
- Three input types in one place: photo, text, and PDF all feed the same assistant, so you don't juggle separate apps for a worksheet and a reading.
- Steps come with the answer: the numbered working is more useful for learning than a bare final result.
- Fast turnaround: most answers land within seconds, which keeps a study session moving.
- Broad subject list: math, sciences, history, English, and business are all covered, and chemistry and physics work through the general chat.
- Free tier for testing: you can check the answer quality on your own homework before paying anything.
Cons
- Free tier is ad-supported and capped: the limits arrive quickly during heavy use, and ads break concentration.
- The monthly plan caps at 30 questions and 30 images: that's roughly one problem set a week, which is thin for exam prep.
- Weak on advanced material: upper-level and niche topics get short, generic explanations that skip the reasoning.
- Billing complaints are common in reviews: several users report unexpected charges and slow refunds, so read the cancellation terms before subscribing.
Frequently asked questions
Question AI is an AI homework helper that answers questions from a photo, typed text, or a PDF and shows the steps behind each answer. It's available on the web, Windows, macOS, iOS, and Android.
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