Your kid’s first “I get it.” moment.
Fifteen minutes a day.
Adaptive practice that builds confidence, not anxiety. No scores that drop, no punishment for mistakes, and one quiet email a week so you actually know what is clicking.
14 days free. No card needed. Cancel anytime.
Tap a wrong answer on purpose. See what it says.
It didn’t say “wrong.” It said what went wrong.
Most apps make wrong answers by nudging the right one up and down. Pick one and you get a red X. Briveli keeps a list of 30 named mistakes kids actually make, across 11 operations from carrying to the Pythagorean theorem, and builds its wrong answers from them wherever it can. Pick one and the engine tells your kid which mistake it was, in words, with a drawing of what they actually did. Where it has nothing to name, it does not pretend: your kid gets the worked steps, not a made-up diagnosis.
It looks like you added instead of multiplied. Multiplication means "groups of". For example, 3 × 4 means 3 groups of 4.
You’re close! It looks like you may have counted one too many or one too few groups.
You’re close! It looks like you may have counted one too many or one too few groups.
30 named misconceptions across 11 operations, kindergarten to 8th grade: addition, subtraction, multiplication, division, fractions, area, perimeter, percent, integers, scientific notation and the Pythagorean theorem. Each has a written explanation, and when the numbers are small enough to draw, one of four visuals: an area model, a number line, a place-value chart or a fraction bar.
A wrong answer costs nothing. It changes what comes next.
Your kid gets a wrong answer. Nothing drops, nothing turns red, no streak breaks. What changes is the next question: it eases off, and whatever the skill was built on comes back around. Briveli is keeping a private estimate of what they actually know, and a miss is just new information about where to go next. There is no score to lose, because there is no score.
What that buys you: three right answers in a row is enough for the estimate to clear the bar, and Briveli still waits for a fourth before calling anything learned. So a lucky guess or two never turns into “mastered” on the Sunday email.The model is Bayesian Knowledge Tracing, standard in tutoring research, run here at pInit 0.10, pTransit 0.10, pGuess 0.25, pSlip 0.10, mastery at 0.85. The meter above is those exact numbers, not an illustration.
2,657 skills, wired so nothing unlocks before what it depends on.
This is the part that catches a kid who is quietly behind. Fractions in fifth grade go wrong because something in third never landed, and Briveli knows which something. Every skill from kindergarten counting to 8th-grade linear equations is wired to what it rests on, so when “groups of” finally clicks, the doors it opens open in order, and the ones it does not are still shut.
The map below is 64 real skills and their real prerequisite links, sampled from all 2,657 so it can breathe. The sweep walks the full 2,657 in an order where nothing comes before what it depends on.
Built on Common Core, which most state assessments draw from, so there is test prep too. Also organised the way your school does, by textbook (Eureka Math, enVision,Go Math!, Singapore Math, Big Ideas, Saxon).
One email a week. A Sunday paper, not a dashboard.
No dashboard you have to remember to open. Every Sunday: a headline, a short note on how the week went, the skills mastered, what is working, how many days they practised, what to support, and what next week holds. The note is written by AI from the week’s data; the skill names come from the database and are never invented. One link to the dashboard if you want more.
Multiplying bigger numbers is starting to stick.
Hi Priya, Maya spent most of this week on multiplying two-digit numbers by one-digit numbers. Early in the week she was adding the two numbers instead of multiplying them; by Thursday that had stopped, and she worked 24 × 6 through on her own.
- Multiply 2-Digit by 1-Digit
- Multiplying by 10
- She estimates before she multiplies, so wild answers get caught.
Practiced 4 of 7 days, about 52 minutes total.
- Problems that say “groups of” still get added instead. Ask her what 3 × 4 means and wait for “three groups of four.”
Division as equal sharing, which leans on the multiplication she just built.
Open Briveli ›You’re receiving this weekly recap because you have an active Briveli account.
Manage notifications or unsubscribe.
Briveli, 1519 E Chapman Ave. #278, Fullerton, CA 92831
Fifteen minutes. Then dinner.
Add your kid
A first name, a grade, an avatar they pick, and up to three interests from a fixed list, which we use to word their problems. No email and no password for your child.
They practise
A Daily Session is 15 problems, about 15 minutes, at the level the engine believes they are at. Quick Practice (7), Review (15), a 3-minute Speed Round and a Deep Dive (25) are there when you want them. When a skill needs teaching first, one of 600+ animated lessons does it.
You get one email
Sunday. A headline, what is working, what to support, what comes next. The dashboard is there when you want more; the email means you never have to remember to open it.
- ×No score that drops. Progress only goes forward. If your kid plateaus, the prerequisite gets quietly re-taught.
- ×No streaks, gems, coins or leaderboards. Nothing to lose, nothing to chase.
- ×No ads, no in-app purchases. Nothing inside the app trying to sell your kid anything, ever.
One price. Nothing to buy inside.
No free tier, no upsells, no coins. The subscription is the entire business model, which is why there are no ads and nothing inside the app is for sale. Both plans are the whole product: all 2,657 skills, every lesson, the named mistakes, the Sunday email. Family just adds kids.
$14.99 /month
or $119 a year
- Unlimited practice sessions
- Smart hints when your kid gets stuck
- An endless supply of word problems
- Detailed progress analytics
- The Sunday email: a weekly parent progress report
- Priority support
$24.99 /month
or $199 a year
- Up to 3 kids on one parent account
- Unlimited practice sessions for every kid
- Smart hints when they get stuck
- An endless supply of word problems
- Per-kid progress analytics
- A Sunday email for each kid
- Priority support
14 days free. No card to start. If you never add one, the trial simply ends and nothing is charged.
You hold the account. Your kid holds a first name.
COPPA compliant from day one. Parents are the account holders. We never collect an email address or any other personal information from a child, we show no ads, we run no trackers, and we sell nothing to anyone. You own all of it.
- A first name
- A grade level
- An avatar they pick
- Up to three interests, from a fixed list
- Practice data: answers and timing
- Email address
- Last name
- Photos
- Location
- Anything for advertisers
The ones parents actually ask.
What grades does Briveli cover?
Kindergarten through 8th grade, aligned to the Common Core State Standards. That is 2,657 skills across counting and place value, operations, fractions, decimals, ratios, expressions, equations, functions, geometry and statistics.
What happens when my kid gets something wrong?
Where it can, Briveli names the mistake. Picking 30 for 24 × 6 gets an explanation that they added instead of multiplying, with a drawing of what they did, rather than a red X. It can do that for 30 named mistakes across 11 operations, from carrying to the Pythagorean theorem. Anywhere else, a wrong answer gets the worked steps, not a diagnosis it cannot back up. Either way there is no score to lose.
How does the adaptive difficulty work?
Bayesian Knowledge Tracing keeps a running estimate of whether your child knows each skill and adjusts what comes next. The real parameters are on this page, under “what the engine believes.” A skill is only marked mastered after at least four attempts.
Is there a score that goes down?
No. There is no cumulative score, no stars that disappear, no points lost. Progress only goes forward.
How long is a practice session?
The default Daily Session is 15 problems, typically about 15 minutes. Kids can also pick Quick Practice (7 problems), Review Mode (15 problems on tricky skills), a 3-minute Speed Round, or a Deep Dive (25 problems). Consistent, short practice beats long cramming sessions.
Can my child use this on an iPad?
Yes. Briveli runs in the browser on an iPad (Safari or Chrome), so there is nothing to download. It is built mobile first with large touch targets, so it works on iPads, tablets and phones.
Do I need a card to try it?
No. The 14-day trial takes no payment method at all. If you never add one, the trial ends and nothing is charged.
What data do you collect from my child?
First name, grade level, an avatar they pick, up to three interests from a fixed list (used to word their practice problems), and practice data (answers, timing). No email, no last name, no photos. Parents own all data.
Still have a question? Email support@briveli.com. The founder reads every one.
See if it clicks.
Fourteen days, no card, no scores that drop. If it is not the right thing for your kid, it simply ends.