Free for students · Philippines & worldwide

Highlight anything.
Cassie explains it.

Your AI study buddy for readings, homework and reviewers — on any website, PDF, slide deck or photo. She explains the why, so it actually sticks.

Start free
No account needed Your notes stay on your device Phone, web & Chrome
Any websitePDFsGoogle DocsGoogle SlidesPowerPointWord filesPhotos of your notesGraphs & diagramsYour phoneChrome Any websitePDFsGoogle DocsGoogle SlidesPowerPointWord filesPhotos of your notesGraphs & diagramsYour phoneChrome
How it works

Three moves. That’s it.

No prompts to learn. Cassie meets you where you’re already studying.

1

Highlight or snip

Select a sentence, drag a box around a graph, or drop in your PDF, slides or a photo.

2

Ask Cassie

Explain, answer, write code — or ask for a reviewer, a quiz or flashcards.

3

Actually get it

Step-by-step reasoning, real graphs, and a board to try it yourself. Then save it as Word, PDF or an image.

Features

Everything a study buddy should do.

Built for real coursework — readings, problem sets, lab reports and the night-before review.

Highlight anything

Explain it, answer it, or write the code — right on the page, with follow-up questions.

Snip a graph. Sketch on it.

Grab any picture, graph or question. Cassie explains it on a board beside the page.

PDF in. Reviewer out.

PDFs, PowerPoint and Word files — diagrams included. Save the reviewer as Word, PDF or an image.

Real graphs

No ASCII art. She draws the graph — then you try.

Your own focus timer

25/5, 50/10 or whatever works for you.

She remembers

Your topics, weak spots and streak — kept on your device.

Real talk

When it’s not about homework, she listens — honest, never just flattering.

Made for learning, not for test time.

Cassie explains the reasoning, quizzes you, and turns your lessons into reviewers. She’s for readings, homework and review — not for use during a test or quiz.

Because the point isn’t the answer. It’s you knowing it.

Private by design

Your notes are yours.

No account

Open it and start. No sign-up, no email, no tracking profile.

On your device

Chats, memory and reviewers are saved in your browser — export a backup any time.

Bring your own key

Power users can plug in a free Groq or Gemini key for unlimited use on the free plan.

Pricing

Student prices. Seriously.

Start free for a week. Keep going on Free, or upgrade when Cassie becomes part of how you study.

Free

See what the fuss is about.
₱0forever
7-day free trial of Plus included
Start free
  • 7 days of everything in Plus
  • Then 5 highlights & 5 snips a day
  • 3 file reviewers a month (PDF, slides, Word)
  • Board, focus timer & memory
  • Unlimited with your own free API key
Most popular

Plus

Study as much as you want.
₱149/ month
billed monthly · cancel anytime
Join the waitlist
  • Unlimited highlights & snips*
  • 30 file reviewers a month
  • Reads pictures, diagrams & handwriting
  • Save as Word, PDF or image
  • No API key needed

Pro

For finals season — every season.
₱349/ month
billed monthly · cancel anytime
Join the waitlist
  • Everything in Plus
  • 150 file reviewers a month
  • Whole books & long slide decks
  • Smartest models first
  • Sync across your devices

*Fair use. Paid plans are launching soon — everything on Free works today.

FAQ

Questions, answered.

Is Cassie really free?

Yes. Free includes a 7-day trial of Plus, then a daily allowance of highlights and snips plus a few file reviewers each month. If you have your own free Groq or Gemini key, you can use Cassie as much as you like.

What can she read?

Any website you highlight or snip, PDFs, PowerPoint and Google Slides, Word files and Google Docs, and photos or screenshots of your notes — including the diagrams and graphs in them.

Does it work on my phone?

Yes — open Cassie in your phone’s browser and add it to your home screen. The highlight popup, snipping and side panel live in the Chrome extension on your computer.

Where do my notes and chats go?

They’re saved in your own browser, not on our servers. Your question and any file you attach are sent to the AI service to get an answer, and that’s it. You can export a backup or clear everything at any time.

Can I use Cassie during a test or quiz?

No — and please don’t. Cassie is built for studying: understanding readings, practising, and making reviewers. Using her during a graded test or quiz isn’t what she’s for.

How do I pay from the Philippines?

When paid plans launch you’ll be able to pay in pesos with local options like GCash and Maya, or by card. Everyone else pays in US dollars.

Study with Cassie tonight.

Free, private, and ready on any page you’re reading.

Open Cassie — it’s free