A clearer way
to study.
Get unstuck. Understand the steps.
Take that next lightbulb moment with you.
“Okay, but why
does that work?”
Try it yourselfScratchpad · no AI
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A question for every curiosity.
Standard calculator
Instant arithmetic. No AI credits used.
Use × explicitly: 2 × (3 + 4). % divides by 100; 200 × 15% = 30. Results use up to 12 significant digits.
Make the next step yours.
Bring your question
Type it out or attach the relevant photo or PDF. A little context helps.
Work through the why
Use the explanation alongside your own scratchpad. Check it against your course materials.
Keep what clicks
Bookmark an explanation, write your own notes or make a flashcard for later practice.
What can I use for free?
The standard and scientific calculators, unit converter, grade planner, scratchpad and worksheet maker use no AI credits. Sign in to use your device notebook and manual flashcards without purchasing credits.
How much does an AI explanation cost?
Text uses 1 credit, an image 2, and a PDF 5. A verified account and available credits are required. Simple arithmetic is calculated locally for free. View plans and credit packs.
Can I upload my assignment?
Upload one relevant question as a still JPEG, PNG, WebP or GIF up to 16 megapixels, or a PDF with up to two pages. Files must be under 4 MB. Very detailed images or complex PDFs may need to be simplified.
Is this useful for educators?
Use the local tools to check calculations, prepare your own worksheets and separate answer keys, and demonstrate a problem with the scratchpad. Review any AI-generated explanation before using it in class.
Where are my notes saved?
Notebook items are stored only in this browser under your account, not synced to the cloud. Signing out clears them. Export a copy regularly, especially on shared devices. Recent answer history lasts only in the current tab.