Meet
chud

It explains until it clicks, then checks that it landed — on a floor of lessons a person sat down and wrote.

Answers immediately. No account, no card.

ChatStudy

Morning, Devesh — one decision worth making?

Ask CHUD anything
Normal· GPT-5
Create an imageWrite or editSearch the web

One assistant

Talk to CHUD like a person.

Writing, planning, code, arguments — one assistant across all of it, and it argues back when you're wrong. There's nothing to configure and no prompt to engineer: you say the thing you're stuck on, and CHUD picks the depth, the tools, and the sources on its own. School is where it goes deepest, but it's the same CHUD everywhere.

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In the conversation

Hard questions get a hearing.

Ask something with stakes and Pip convenes its council — four lenses on one question, a verdict with the vote, and the dissent kept on the record.

Should I take AP Physics C or AP Stats next year? I'm aiming for engineering but my load is already heavy.
Council verdict
Physics C — if you clear room for it first.

Engineering programs lean on mechanics, and Physics C is where that base gets built. It only pays off with real weekly hours behind it — take it instead of something, not on top of everything.

3 of 4 chose this — the Simplifier dissents

dissent — Stats is the lighter lift and keeps the same doors open. The load is the real risk this year.

How the council decided
How can I help you today?

What you get

A few features that do a lot

Chat, research, and study — the same assistant underneath, a different surface for each kind of work.

Chat

It explains, drafts, and works through problems with you — teaching, not just answering. Every new chat starts already knowing your classes and how you want to be talked to.

I don't get why the sky is blue

Sunlight scatters off air molecules, and shorter blue wavelengths scatter the most — so blue light reaches you from every direction.

Then why are sunsets red?

Learn more →

Research

Answers come back with the sources attached, and you can open every one. Claims it can't verify are flagged, not stated.

Do octopuses really have three hearts?

Yes — two pump blood to the gills1 and one to the rest of the body. Two of the three stop when it swims.2

Source 1 ↗Source 2 ↗Unsourced claims get flagged

Learn more →

Study

Hand-authored courses for every exam in the catalog, with quizzes that check what stuck. Point it at your own notes and it builds the quiz from those.

Physics · Unit 3 quiz2 of 8

What determines a photon's energy?

Its brightness
Its frequency — E = hf

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How it works

Less magic. More method.

Three things happen behind every answer. None of them are a mystery — so here they are, doing it.

You ask“I don’t get why cells burst in water”
It looks it upAP Bio · Unit 2.7 — Osmosis
It teaches, then checksExplains it, then asks you one question
Answer from a written lessonnot improvised

It finds the lesson first

Your question is matched to a written unit before a single word is generated — then it teaches that unit and checks whether it landed.

YouMAJ
your class, same syllabus
AP BiologyUnit 3 testin 4 days
AP Calc ABQuiz — derivativesin 9 days
SATTest datein 6 weeks

Your week, with dates on it

Add your classes and test dates once. Every plan after that is counted down from a real day on your calendar.

Unit-3-syllabus.pdfRead
24 flashcardsfrom your own file
10-question quizfrom your own file

Your own file becomes practice

Drop in a syllabus, a lecture PDF, your notes. It reads them and hands back the two things you can actually study from — a deck and a quiz drawn from that document, not from the internet.

What you get

Four things it does properly.

Explain hydrogen bonding simply
Rewrite this paragraph, keep my voice
Quiz me on Unit 3 — 10 questions

One assistant, every lane

Write, plan, debug, argue with your thesis — one thread, one model picker, no app-switching.

syllabus.pdf
unit-3-notes.docx
lab-data.xlsx
essay-draft.md
review-set.pdf
syllabus.pdf
unit-3-notes.docx
lab-data.xlsx
essay-draft.md
review-set.pdf

Bring your own files

Drop in a syllabus, a lab sheet, a chapter. It reads them and cites what it used.

MONUnit 3 recall
TUEPractice set
WEDWeak spots

A week that plans itself

Give it the exam date. It works backwards into days you can actually do.

Docs
Sheets
PDF
Markdown
Slides

It ends up where you work

Google Docs, Sheets, PDF, Markdown — the answer leaves the chat as a real file.

Made for school

Built around school.

Most assistants treat school as one more topic. This one keeps your classes, your mornings, and your exams in the frame — every answer starts from where your week actually is.

An open notebook worked over with a pencil, a half-eaten apple at the edge of the table

Give CHUD a job

Point it at a lane and go.

One writing job, one code job, one planning job, one exam job. Each chip submits its full sentence — what you click is exactly what CHUD is asked, no hidden rewrite.

Click one — it answers as a guest, no account needed.

CHUDGuest · 4 free asks
Rewrite this paragraph so it still sounds like me, not like it was written by an AI.

Sent word for word

Ask CHUD anything

A syllabus of its own

Most AI gets you almost there. It explains the topic beautifully and then misses the one distinction your exam is actually testing, because it is guessing at the course from the internet.

chud isn't guessing. Under each course sits a floor of hand-authored units — scope, sequence, the specific traps — so an answer lands where a teacher would put it.

There's a huge difference between 90% right and right. The floor is what closes it.
— Authored coverage · every exam in the catalog

AP Biology · Unit 3

Cellular energetics8 lessons
Photosynthesisauthored
Common exam trapflagged
Your mastery72%

Talk to it like a person

There is nothing to set up. No settings to get right first, no magic phrasing to learn — you type the thing you're stuck on, in the words you'd say it out loud, and it starts working.

It picks the depth, the tools and the sources on its own, and tells you what it did. When it needs a decision from you, it asks instead of guessing.

Nothing to set up and nothing to learn. The first message works, and it already knows what's on your syllabus.
— No setup · works on the first message

One message, four steps

Read your notes3 files
Searched the web4 sources
Wrote the answercited
Checked you got it1 question

It gets sharper the longer you use it

It keeps what matters: your classes, your exam dates, how blunt you want it, the mistakes you keep making. Every new chat starts already knowing them.

Memory is a switch you own. Turn it off and it forgets; open Settings and you can read every fact it has kept about you, and delete any of them.

Memory you can read and delete. It keeps track of what you've mastered so it drills what you haven't.
— Memory · yours to read and delete

What it remembers

Classes6 enrolled
Next examin 12 days
Tonedirect
Facts kept60 max

Classes + mornings

Tell it your week once.

Add a class and the days it meets. Every morning after, the brief opens the day — what needs you first, what's already cleared.

AP Physics 1 · Meets

Starts9:10 AM
Ends9:55 AM
MonTueWedThuFriSatSun

Weekdays · 9:10 AM–9:55 AM

Tuesday, April 14

Physics first, then a clear afternoon.

Needs you today

Unit 3 quiz — eight questions

Built from the notes you added yesterday.

Start the quiz

Problem set 4 — due tomorrow

From AP Physics 1

Morning light across a desk mid-study
A study desk with an open notebook in warm light

The part that took the longest

These lessons were written. Not generated on demand.

Every course below has a hand-authored lesson sitting behind each topic — written before anyone asked for it. This is exactly how much of each one is finished, least-finished first.

Counting the authored lessons in the shipped curriculum…

AP® and SAT® are trademarks of the College Board. ACT® is a trademark of ACT, Inc. Neither endorses, sponsors, or is affiliated with CHUD.

The rule it keeps

The work stays yours.

Pip explains, quizzes, and points at the weak spot — then hands the pen back. What leaves your hands is something you can defend.

A pen resting on paper in low light

How it teaches

The same question, answered two ways — your call, every time.

Understand and Solve are a real toggle in the app, not a personality. This is what each one actually does to the same physics problem.

A 2.0 kg block slides down a frictionless 30° incline. Find its acceleration.

One force has a component along the slope, and it is not the normal force. Gravity is mg straight down; break it into the part pressing into the incline and the part sliding along it. Which trig function gives you the along-the-slope piece for a 30° angle? Write that expression and tell me what you get — the mass is a trap, and you'll see why once it's on the page.

Holds the final number back until you've engaged. Never leads with the answer.

And if you insist on the answer in Understand mode, it gives you the answer. A tool that refuses gets closed, and a study aid nobody opens teaches nobody anything.

Results

It was built to pass real exams — then it did.

These are the actual AP scores earned studying with the proof of concept that became chud. The 3 stays in the sentence — it's the one that made the rest worth fixing.

5
AP Seminar
5
AP World History
4
AP Calculus AB
3
AP Physics C: Mechanics
500+
Beta testers
6
Months in beta

Beta tested by over 500 people across six months of daily studying before anyone was asked to pay for it.

No ads, ever

Your attention isn't the product, and it never becomes the product.

10% of profit goes to free STEAM education

A commitment, through SPARKk — not a number we've hit yet.

Cites its sources

Real links you can open, or it says it couldn't find one.

Devesh Waghmare, who built chud.

Who built this

Devesh Waghmare studied for his APs on nothing but this while it was still in trial — own class materials uploaded, nothing else. Here's what came back.
5
AP Seminar
5
AP World History
4
AP Calculus AB
3
AP Physics C: Mechanics

It is Physics — but we must be honest with you.

No invented stats. No user counts. No "reviewed by educators." Just a tool its builder needed, that worked — with every result left on the board exactly as it came back.

A SPARKk product — gosparkk.com · @deveshwaghmare9

For the people it was built for

Built for the way your week actually goes.

Index cards on a roof before an exam, a unit you're rereading on the train, the thing you finally get at eleven at night with a friend — school is where this starts, and it doesn't stop there.

Two students laughing over one laptop at a sunlit library table, one in a cobalt hoodie
Art student sketching on the train with a phone propped against a cobalt bag strap
Three students on sunlit quad steps, one mid-explanation, a cobalt tote beside them

Pricing

Free is a real tier, not a countdown.

Free is enough to think out loud, and it stays free. The paid tiers are for the work that keeps going after the summary — with reasoning deep enough to trust and sources you can check. No trial that quietly bills you on day eight.

Free

$0forever
  • Think a problem out loud
  • Draft, outline, and pressure-test ideas
  • No card required, ever

Student

$8/mo
  • Everything in Free
  • Room to work a problem all the way down
  • The authored course lessons, quizzes, and flashcards

Pro

$18/mo
  • Everything in Student
  • Deep reasoning for system design and tradeoffs
  • Deep research with sources you can open

FAQs

CHUD is the assistant — the character you talk to across writing, code, research, and study. The animated orb in the app is CHUD's live status; the static blue mark is its logo. Same face, one assistant, everywhere.

Meet your assistant.

CHUD answers in the box at the top of this page — no account, no card. Start free when you want it to keep your work.

Compare plans
Pip is asleep