Calyxa
Summary
The copy-paste-to-ChatGPT loop takes roughly ten minutes per problem and leaves you with an answer you cannot explain on the test — Calyxa is a Chrome extension built to break that loop by putting a tutor directly on the homework tab you already have open.
Calyxa overlays annotations and voice explanations on whatever page you are working on — Khan Academy, Canvas, Google Classroom, WebAssign — without requiring you to screenshot or context-switch. You describe where you are stuck, and it coaches you toward the answer rather than handing it over. The in-page annotation layer marks specific terms as it talks about them, so 'the middle term' refers to something you can actually see. Free accounts are capped at ten sessions per month; memory of your recurring misconceptions and study kits that survive the session are paid-only features. Chrome is the only supported browser — the vendor page states this explicitly.
Bottom line: Calyxa earns its place for a student who keeps copying answers and bombing the same question on every test — but if you need more than ten sessions in a month without paying, or you are not on Chrome, it stops being an option before you hit a real study session.
Pricing Plans
Subscription- Price
- $10 /mo for Pro
- Free Tier
- 10 tutoring sessions a month
free
10 tutoring sessions a month
- annotations on any page
- voice tutoring
- session notes
pro
Unlimited sessions with personalization
- unlimited sessions
- remembers your misconceptions
- study kits after every session
- priority support
View full pricing on calyxa.app →
Pricing may have changed since last verified. Check the official site for current plans.
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Pros
Sign in to edit- In-page annotation marks the exact term being discussed as the voice explanation runs, so 'the middle term' points to something visible on screen rather than requiring you to mentally map text to a problem you are staring at in a separate window.
- One keyboard shortcut activates the tutor on your active tab without leaving the homework platform, which eliminates the screenshot-paste-chat cycle that takes roughly ten minutes per problem and produces an answer you cannot reproduce.
- Coaching-first response design asks what you tried before explaining anything, so you are pushed to think through the step rather than handed a solution to transcribe — which means you are more likely to answer the same question correctly on a timed exam.
- Compatibility with major homework platforms — Khan Academy, Canvas, WebAssign, DeltaMath, and others listed by the vendor — means the extension works where students already are rather than requiring a platform migration.
- Session notes and study kits capture what was covered during a tutoring session for later review, so the work done during homework becomes material you can revisit before a test rather than disappearing when the tab closes.
Cons
Sign in to edit- The free tier caps at ten sessions per month — a student doing nightly homework across multiple subjects will hit that ceiling mid-week, at which point the choice is pay or revert to the copy-paste workflow the tool was built to replace.
- Chrome is the only supported browser, stated explicitly on the vendor page — students on school-issued devices locked to Firefox or Safari cannot use the extension at all, and there is no fallback web interface.
- Misconception tracking — the feature that makes the coaching adapt to your specific error patterns over time — is a paid-only feature, so the free tier delivers generic coaching that does not get better the more you use it; teams evaluating this for institutional deployment at scale will find no API and no self-hosted path, which makes a competitor with an LMS integration layer the only viable option.
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About
- Platforms
- Chrome extension
- API Available
- No
- Self-Hosted
- No
- Last Updated
- 2026-07-21T20:16:53.135Z
Best For
Who it's for
- Students using online homework platforms
- Users who want guided learning instead of answer copying
- Chrome browser users seeking page-native AI coaching
What it does well
- Getting unstuck on specific homework problems without full solutions
- Receiving in-page annotations and voice explanations on learning sites
- Building study kits from tutoring sessions for later review
Integrations
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Frequently Asked Questions
- Is Calyxa free?
- Calyxa has a permanent free tier alongside paid upgrades (paid plans from $10 /mo for Pro). You can keep using a baseline version indefinitely without paying.
- Is Calyxa open source?
- No — Calyxa is a closed-source tool. Source code is not publicly available.
- What platforms does Calyxa support?
- Calyxa is available on: Chrome extension.
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Curated lists that include this category
Screenshot fatigue is real: eight steps to paste a problem into a general-purpose chat, read a full solution, copy it down, and still miss the same step on the exam. Calyxa installs as a Chrome extension and floats over your active homework tab. You press a keyboard shortcut, describe where you are stuck, and the tool coaches you through the problem on the page you already have open — no tab switching, no pasting.
The differentiating feature is the annotation layer. Instead of describing a step in text, Calyxa draws labeled marks directly on the terms it is discussing and leaves a why-note on the step — so when it references ‘the middle term’ in a factoring problem, that term is visually marked on your screen. Voice tutoring runs alongside the annotations, so you hear and see the explanation at the same time rather than reading a wall of generated text.
The tool is built for students who want to understand the concept well enough to reproduce it under exam conditions, not for students who want a solution to copy. That framing is baked into the product design: it asks what you tried first before it explains anything. The free tier covers ten sessions per month; study kits that persist after the session and misconception tracking across sessions are paid-only features. The vendor page confirms Chrome is the only supported browser — there is no web app, no Firefox or Safari extension, and no API.
The tool works across Khan Academy, Canvas, Google Classroom, MyLab Math, DeltaMath, WebAssign, AP Classroom, and any page with a PDF — based on the vendor’s stated compatibility list. There is no self-hosted option and no API for institutional integration.