01
Highlight
Pick any words on a website, PDF, slide or photo of your notes. Cassie sees exactly what you mean.
Understand your lessons.
Pass your exams.
Highlight anything you're reading and Cassie explains it step by step, at your level. Then she turns it into reviewers, quizzes and exam plans.
Try it: highlight any word, or tap a bold one
Energy in cells
Every cell in your body needs energy. It gets it through cellular respiration: inside the mitochondria, glucose from your food reacts with oxygen to make ATP, and you breathe out the carbon dioxide that’s left.
Plants run it the other way. With the chlorophyll in their leaves, they use photosynthesis to turn carbon dioxide, water and sunlight into glucose, and the oxygen you breathe.
CASSIE
This is how Cassie works on any website, PDF, slide deck or photo of your notes.
Cassie doesn't just give you the answer. She explains the why, checks that you got it, and helps you remember it for the exam.
How it works
Highlight. Understand. Remember.
The same three steps for a module, a 50 page reviewer or a photo of the board.
02
Understand
She explains it step by step, at your level, in English, Filipino or Taglish. Then she checks that you got it.
03
Remember
What you miss comes back as quizzes and flashcards, and your exam gets a plan, day by day.
Study tools
Made to play with.
Three of the tools inside Cassie, all free to try.
Labs you can play with
29 hands-on labs. Pull apart the human body in 3D, fly through the solar system, and run experiments like a pendulum.
Flashcards that come back
Cassie makes flashcards from any answer or file, and brings each one back just before you would forget it.
A board that draws
Ask Cassie to graph any equation and she draws it on the board, step by step, so you can see the math.
For every student
From your first module to your board exam.
Cassie explains at your level, so the same app works for a grade schooler and a nursing reviewee.
- BiologyCells and energy
- AlgebraSolving equations
- FilipinoPanitikan
- Philippine HistoryRizal and the Revolution
- ChemistryMoles and reactions
- PhysicsForces and motion
- EnglishGrammar and essays
- Araling PanlipunanEkonomiks
- NursingNLE review
- TeachingLET review
- AccountingBoard exam review
- Science for kidsThe water cycle
Nursery and grade school
Simple words, pictures, a voice that reads aloud, and games and labs that make it fun. Best with a parent or teacher.
High school
Homework, readings and modules made clear. Snap a photo of a problem and see how to solve it, step by step.
College
Long PDFs, slides and notes become reviewers, flashcards and practice quizzes. Research with real papers.
Board and licensure exams
A day by day plan for the LET, the NLE or any exam, with quizzes on what you keep missing.
Free Exam Rescue PlanLET planLearn your way
Talk with Cassie by voice, listen to your notes as a podcast, and ask in English, Filipino or Taglish.
Study anywhere, together
On your phone, in your browser, and on any page with the Chrome extension. Study rooms let friends review together.
Meet Cursor CassiePrivate by design
Your notes are yours.
No ads, no trackers, and we never sell your data.
What stays with you
Your chats, flashcards and settings stay on your device. Files, photos and voice are used only to answer you, then let go.
See exactly what is sent, and whereWho makes Cassie
Cassie is made independently in the Philippines, not by a big tech company. It started with a problem students here know well: long readings, hard lessons and big exams, with no one to ask at midnight. Every part is built for that, and the basics stay free.
Pricing
Pasado ka dito.
Free forever, no card needed. When you want more, one payment covers your whole semester. Name your exam, like Gen Chem finals, Pre-Calc, the NLE or the LET, and Cassie plans it day by day.
Free
See what Cassie can do. Best for trying it out.
₱0forever
No card needed
Start free
- 20 questions a day: chat, quiz & highlight
- Ask in Taglish, Filipino or English, typed or said. Cassie answers the same way
- Reviewers from your PDFs, slides & Word files
- 20 quick pictures a day, plus 3 Gemini pictures a week
See everything in Free
- Reads photos, diagrams & handwriting
- Save chats as Word, PDF or image
- Explore 3D: the human body (all 10 systems, boy & girl), cells, the solar system & the globe, 2 free views of each a week
- Talk with Cassie by voice: her studio voice while this month’s lasts, then Cassie types her answers
- Quiz me, Review my mistakes & Teach Cassie
- Labs: every simulation, puzzle, game & study tool, plus Real 3D twice a week in each lab
- Board, graphs, focus timer, memory & sync
- Chrome extension: highlight, snip, Teach me & ask about any page
- Research with real papers & citations
- Unlimited with your own free API key
Best for school
Plus
Your Pasado Pass for Gen Chem, Pre-Calc, the NLE, the LET or any exam you name. Five times the questions.
Pasado Pass
₱599/ semester
about ₱4 a day
Join the waitlist
One payment for 5 months. Never renews. 7 days to change your mind.
- Everything in Free, including the Finals Reviewer Kit (your files become reviewers, quizzes & flashcards), an exam plan and your weekly progress card
- 100 questions a day
- 100 answers a day from Cassie’s smarter model (Free gets 10)
- 5 Gemini pictures a day
- Up to 5 exam plans at once, and plans from your notes
See everything in Plus
- All the 3D, any time: the body, cells, solar system, globe & Real 3D labs, plus the Museum quiz
- Save & print: boards as PDF, Cornell notes & reference lists
Pro
The most of everything, and the smartest answers. Best for finals season.
₱1,999/ semester
about ₱13 a day
Join the waitlist
One payment for 5 months. Never renews. 7 days to change your mind.
- Everything in Plus
- 150 questions a day
- 15 answers a day from Cassie’s smartest model, then 100 from the smarter one
- 20 Gemini pictures a day
₱599 for the whole semester: about ₱4 a day, less than one hour with a tutor.
Daily limits start again at midnight, Philippine time, and weekly ones on Monday. They are for one person studying, not shared accounts or automated use. Paid plans are launching soon. Everything on Free works today.
FAQ
Questions, answered.
What is the Pasado Pass?
It’s Cassie Plus for your whole semester: 5 months for one payment of ₱599. It never renews, so nothing is charged when it ends, and we tell you in the app and by email about a week before it does. If it isn’t for you, email [email protected] within 7 days of paying and you get all of it back, no questions asked.
Is Cassie really free?
Yes, forever, with no card needed: 20 questions a day, 20 quick pictures a day and 3 Gemini pictures a week, plus a taste of the 3D (2 views of each a week) and talking with Cassie. If you add 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 or tablet?
Yes. Open Cassie in your browser and add it to your home screen. For PDFs, Word and PowerPoint, attach the file and tap 📖 Read & highlight: read it inside Cassie and highlight any part. In other apps: on Android, select the words → Share → Cassie. On iPhone and iPad, set up the one-time “Ask Cassie” Shortcut (steps in Cassie → Settings → Use Cassie in other apps). Screenshots and photos of your notes work too. The on-page popup and snipping on a computer come with the Chrome extension.
How do I add Cassie to Chrome?
Download the Cassie extension, then unzip it. Open chrome://extensions, turn on Developer mode (top right), click Load unpacked and pick the cassie-extension folder. Pin Cassie from the puzzle-piece menu and you’re done. No key needed. Works in Chrome and Edge on a 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. If you make an account, these sync so you have them on every device: your profile, settings, saved quiz mistakes, flashcards, exam plans and your weekly study counts. Your chats stay on your device. 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 pay through Lemon Squeezy, Cassie’s payment partner, with a debit or credit card, Google Pay or Apple Pay. GCash and Maya aren’t offered yet; if that changes, this answer will say so. Everything on Free works today with no card.
Study with Cassie tonight.
Free, private, and ready on any page you're reading.
Open Cassie. It's free