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Snap any SAT math question
Take a photo or upload a screenshot of any question from a practice test, Bluebook, or your homework.

Welcome to CalcHack

Save your scan history, keep your streak, and manage Pro across devices.

Guests get the same free scans — an account is only required to buy a Pro membership. You can sign up anytime in Settings.

5 scans left

Stuck on a question?

Snap it. CalcHack finds the fastest way to solve it in Desmos — or tells you when doing it by hand is quicker.

Free plan
5 of 5 free scans left today Go Pro →
1

Snap the question with your camera

2

Get the fastest Desmos strategy

3

Watch it solved on a live graph

Walkthrough

History

Every question you scan is saved here. Pin the tricky ones to review before test day.

Saved scans

No scans yet. Your solved questions will appear here.

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CalcHack Pro

Unlimited scans. Every strategy. Test-day ready.

✓Unlimited question scansFree plan includes 5 scans per day
✓Live interactive Desmos graphsTap through each step on a real calculator
✓"Fastest method" verdictsKnow instantly when Desmos beats algebra
✓Full scan historyBuild a personal review bank before test day
Monthly
$6.99
per month
SAVE 52%
Annual
$39.99
per year · $3.33/mo

Prototype note: checkout is simulated (no real payment). In production this connects to Apple In-App Purchase / Stripe.
Cancel anytime · Score improvement not guaranteed

Settings

Appearance
AI Engine
100% free, no credit card. Get one in ~60 seconds: go to aistudio.google.com → sign in with any Google account → Get API key. Free tier allows hundreds of scans per day. Stored only on this device.
Optional. Get a key at console.anthropic.com. Each scan costs roughly 1–2¢.
Graphing
The demo key works for development. For a published app, request a free key at desmos.com/my-api.
Data
Scan history0 saved scans on this device

Everything is stored on this device only. Daily free-scan usage is tracked locally and survives reloads and cache clears.

Developer (prototype only)

v1.5 · server mode
CalcHack is an independent study tool. It is not affiliated with or endorsed by College Board®, Desmos, or Anthropic. SAT® is a registered trademark of College Board. Graph powered by the Desmos API.

Reading your question…
This usually takes 5–15 seconds