The tutor
Highlight the sentence that won't click and just ask. 6am or 1am, as many times as it takes. It already knows which lesson you're in and which question you just blew.
“Wait, why is that negative reinforcement and not punishment?”
Every lesson free, foreverA tutor that's always there
Studying alone is the hard part. So don't.
BCBA® prep with a tutor you can actually ask. One-on-one, any hour, as many times as it takes. It reads the answers you give, finds the thing you keep mixing up, and drills exactly that. Free lessons for all nine domains, day one.
4,816 questions · 58 lessons · iPhone, iPad & web · built by a BCBA candidate
For iPhone, iPad & Apple Silicon Macs.
Web works on every device.
86%readiness
this week
this week
12day streak
11:04 PM
During independent math work, Marcus rips up his worksheet. Each time, his teacher sends him to the calm corner for three minutes. Over two weeks, ripping goes from twice a session to nine times.
What is the calm corner actually doing?
Pick one and see what makes this different.
Try one now. A real item from the bank
Why we built this
Your question shows up at 11pm. Everything else is asleep.
The recorded lecture, the notes you paid for, the weekly study group: all of it helps, and none of it can answer you. Help runs on a schedule. Getting stuck doesn't.
The recording
You can rewind it as many times as you like. You can't ask it anything. It plays at exactly the same speed whether the concept landed or slid straight past you.
Questions answered: none
The notes you bought
They say it once, in one phrasing. If that phrasing isn't the one that clicks for your brain, there is no second explanation coming, no matter what you paid.
Follow-ups: not supported
Thursday's group session
Genuinely good, and genuinely short. Forty-five minutes, everyone arrives with a question, and yours is the one that doesn't make it to the front of the room.
Next window: Thu, 7:00pm
11:47 PM
11:47 PMok i still don't get why the calm corner is negative reinforcement
Look at what changed for Marcus, not at what the teacher did. The worksheet went away and the ripping went up. Removal + increase = negative reinforcement. Her intent isn't part of the definition anywhere.
11:49 PMbut she was trying to punish him
Right, and that's exactly the trap the exam sets. Punishment is defined by the behavior going down. His went from 2 to 9. Whatever she meant to do, the contingency reinforced it.
11:51 PMok give me one to check i actually have it
Deal. A child whines, the parent hands over the tablet, whining doubles by Friday. Two questions: whose behavior are we labelling, and did something get added or taken away?
Ask it the same thing five different ways at midnight. Nobody's waiting on you, and nobody's watching you take up the room's time.
Lecture + group sessionscheduled help
Your tutorone-on-one, no queue
168 hours in a week. Two of them are scheduled, and you share those two with everyone else who showed up.
Your study crew
Three AIs, one job: no surprises on test day.
Not a chatbot bolted onto a question bank. Each one is wired into what you've actually answered, so the help lands where you're stuck.
The coach
Every morning it reads yesterday's answers and tells you the one thing to fix today, in a sentence, not a bar chart.
“You're not weak on Domain B. You're weak on one move inside it.”
The drill instructor
It builds twelve questions out of your own mistakes, pulled from every corner of the outline where that mistake likes to hide.
“Removal vs. addition. 12 questions. 6 minutes. Go.”
Every morning
Something's been reading your answers while you slept.
You already know Measurement is shaky. What you don't know is the particular way it's shaky, and that's the four points sitting between you and a pass.
The coach doesn't hand you a percentage. It hands you a sentence you can act on before your coffee's cold.
Study coachExample note
You're not weak on Domain B. You're weak on one move inside it.
When the consequence is a removal, you label it by what the adult did instead of what the behavior did. That one move is 9 of your last 12 misses. In Monday's mock you flagged two items on it, changed both, and changed both the wrong way.
Fix it now: 12 questions, 6 minutesStart the set
your answersflagged itemsmock attempt 2time per question
What you get on day one
A whole library, no wall in front of it.
58
lessons across all nine domains. Free forever, not a trial
4,816
practice questions, each with a written rationale
4,353
flashcards that reschedule themselves around what you forget
175
question mock exams, scaled the way the board scales
Yes, we turned the content outline into actual songs.
Because you're going to be in the car for forty minutes anyway, and something about a chorus makes schedules of reinforcement stick when flashcards won't.
Free for everyone, no account neededAlso inside · fieldwork tracker
Your 2,000 hours live here too. Free. Forever.
You’ll log supervised fieldwork for years before you ever sit the exam. Do it in the app you’ll study in: log hours in seconds, see every month checked against the BACB’s actual 2022 or 2027 rules, and print your Monthly Verification Forms. No card, and none of it is ever paywalled.
- ✓Unlimited hour logging
- ✓Monthly checks, 2022 & 2027 rules
- ✓Verification forms, print or PDF
- ✓Import from any tracker in minutes
- ✓Excel, CSV & JSON export, any time
- ✦Core adds a verdict & projected finish date
Your record stays yours. The tracker keeps working even if a paid plan ends; that’s written into our Terms.
August 2026✓ Meets all requirements
92.5hof 20 to 160 required
Supervised 7.6%
needs 5%
Observation 75 min
needs 60 min
Unrestricted 61%
toward the 60% overall rule
Monthly Verification Form
ready for Dr. Alvarez to sign
✦ On pace to finish April 2027
projected from your own months · Core
Checked against the 2027 rules
Also inside · ABA Island
Every hour you log grows an island.
ABA Island turns your fieldwork record into a tiny living world. Each logged hour is a token; the island grows with your total; milestones bring residents. The sky keeps your clock, moon phases included. Pitch a tent, light the lanterns at dusk, roast a marshmallow, fish the pond, and watch the dog chase the cat up the sakura.
- ✓Grows with every hour you log, free
- ✓Your sky, your clock: dusk, night, real moon phases
- ✓Residents at 250, 500 hours and on
- ✓Pets that say hello when you walk up
- ✦Core adds the Nursery: spend hour-tokens on pets, lights & homes, then arrange them
- ✦Study rewards you can’t buy: a streak, a mock exam, a readiness score each earn a piece
No grinding. Tokens come only from hours you actually log, so the world is a record of the work, not a second job. More worlds are on the way.
Pricing
Start free. Upgrade when it's earning its keep.
About a fifth of what the big prep names charge. The lessons never go behind a paywall, whatever you choose.
Free
$0forever
No card, no countdown
- ✓ All 58 lessons, all 9 domains
- ✓ ~20 core questions per unit
- ✓ One full 175-question mock
- ✓ Readiness score & streak
- ✓ All the songs
- ✓ Fieldwork hour tracker: log, check BACB compliance, print verification forms
- ✓ ABA Island: an island that grows with every hour you log
Core
$9.99/ month
14-day free trial · cancel in two taps
- ✓ The full 4,816-question bank
- ✓ Unlimited mock exams
- ✓ 4,353 SAFMEDS cards, Time Attack & your own decks
- ✓ Analytics that find where you're weak, not just what you scored
- ✓ Fieldwork tracker: everything in Free, plus verdict, projected finish date & unlimited supervisors
- ✓ ABA Island: claim milestone residents, spend hour-tokens in the Nursery, earn study rewards you can't buy
- — No AI tutor, study coach or drill instructor
Most popular
Pro
$19.99/ month
14-day free trial · cancel in two taps
- ✓ Everything in Core
- ✦ The AI tutor: highlight any line and ask, 300 a month
- ✦ A daily study coach that reads your actual answers
- ✦ A drill instructor that builds sets from what you keep missing
- ✦ Every explanation anchored to the BACB Test Content Outline
Your price doesn't move.
Core is $9.99 a month, Pro is $19.99. New lessons, questions and songs keep shipping, and the bank is kept in step with the BACB's current requirements — included, at no extra charge.
The rate you start on is the rate you keep.
For scale: a failed attempt costs $265 in BACB + Pearson VUE fees, plus a 30-day wait before you can sit again. A whole year of Pro costs less than that.
Both paid plans start with the same 14-day free trial · Cancel anytime · Terms · Privacy
Test day is coming either way
You've got this. We'll handle the noticing.
Free account, no card, every lesson unlocked. Take one question and see.