Kestrel

How it works

Marks live in the working. So does Kestrel.

Most study apps only check your final number. Kestrel checks each step, like an HSC marker would.

Write your working

Type it, or handwrite it in exam mode. Step by step, just like the paper.

Every step is marked

1Top speed: 24 m/sCorrect

2Distance: 192 mNot quite

3Total: 504 mCorrect

Fix the exact mistake

Common error: v × t only works at constant speed. While accelerating, use ½(u + v)t.

Then try again and lock in the marks.

How you learn

Taught first. Then tested.

1,120 short lessons across every topic. Each one teaches before it asks, and every mistake becomes something you fix for good.

Every lesson starts by teaching

The big idea, the equations, then a worked example you predict one step at a time. Guess each step, reveal it, and see straight away if you had it.

Mistake replay

Get a step wrong and Kestrel replays it: your answer struck out, the right one in, and a quick “what went wrong?” so you name the slip yourself. Then try its twin with new numbers.

It comes back at the right time

Missed questions return after 1, 3 and 7 days with new numbers, opening with a reminder of exactly what tripped you up last time.

Trial papers and revision sheets

Timed mini trial papers paced at HSC speed, marked on your working. Plus a one-tap revision sheet for any module, ready to print.

The fun part

Study, but make it a game.

Every right answer pays off. Practise a little every day and watch it add up.

Streaks

Show up daily and keep the flame alive.

1.5×

Combos

Answers in a row multiply your XP.

Lv 10

Levels

Effort you can actually see.

1v1

Duels

Race a mate on the same five questions.

Top 5%

NSW leaderboard

See where you rank against every Kestrel student in NSW, plus a weekly class table.

For schools

Know who's stuck before the exam does.

Class mastery for every syllabus topic, updated as students practise
See which students need help, and assign practice in one click
The questions your class keeps getting wrong, with the typical wrong answer and why, ready to put on the board
Students practise by choice: streaks, duels and a weekly class table
Minimal student data, stored in Australia. Teachers are always free

Book a free one-term pilot

$30 per student per year after the pilot · hello@kestrel.courses

11 PhysicsExample class

Motion basics92%

Equations of motion78%

Vectors55%

Relative velocity31%

9 students are stuck on relative velocity

Pricing

Try everything free. Keep it for $1.90 a week.

Every new account gets 7 days of full Pro. No card needed. After that, stay on the free plan or keep Pro.

Free

After your free Pro week

One subject
10 questions a day
Step-by-step marking
Streaks and levels

Start free

Kestrel Pro Most popular

$99 per year

Just $1.90 a week

Every subject, unlimited questions
Exam mode with handwriting
Timed mini trial papers
Duels, Rush and the NSW leaderboard
Full topic map and progress reports
Cancel any time

Start your free Pro week

Schools

$30 per student / year

Teachers always free

Everything in Pro, for every student
Teacher dashboard and class insights
Assignments sent to the class
Free one-term pilot

Book a pilot

14-day money-back guarantee. If Pro isn’t for you, ask within 14 days of paying and we’ll refund you in full. Cancel any time in two taps.

Prices in AUD. Bring a mate: when a friend joins with your invite link, you both get an extra free week of Pro.

For parents

Practice you don’t have to nag about.

Streaks, levels and friendly duels make practice something students choose to do, and the marking works like an HSC marker’s.

Marks the working, not just the answer

Every step is checked. When something goes wrong, Kestrel names the exact mistake and has your teen fix it.

A progress report every Sunday

Your teen can switch on a short weekly email for you: questions done, topics practised, and where they’re improving. You confirm before anything is sent.

About $1.90 a week

$99 for the whole year, covering every HSC maths course plus Physics, Chemistry and Biology. Backed by a 14-day money-back guarantee.

Easy to pay for

Your teen can send you a secure payment link from the app. You pay by card through Stripe, and you can cancel any time.

FAQ

Questions

Is there a free trial?

Yes. Every new account gets 7 days of full Pro with no card needed. After that you can stay on the free plan (10 questions a day) or keep Pro.

What if it’s not for me?

Ask within 14 days of paying and we’ll refund you in full. You can cancel any time from your account in two taps.

Is it safe for my child?

We collect only first name, email, year and subjects, plus how they go on questions. No photos, birthdays or location. Data is stored in Australia, never sold and never used for ads. Students under 15 need a parent or carer’s OK to sign up.

Is it aligned to the NSW syllabus?

Yes. Questions are written for the current NSW HSC syllabuses, organised by topic, for Years 11 and 12. They're original questions in HSC style, not copied past papers.

How does step marking work?

You enter each line of working. Kestrel checks every step against worked solutions, so a slip in step 2 gets flagged in step 2, with the common error explained.

Can I use it on my phone?

Yes. Kestrel runs in the browser on phones, tablets and laptops, and your progress syncs across them. Add it to your home screen and it opens like an app, and it keeps working if the school Wi-Fi drops.

What data do you collect?

Only your first name, email, year and subjects, plus how you go on questions. No birthdays, photos or location. It's stored in Australia and never sold. You can download or delete it any time.

Can my parent pay for it?

Yes. Tap "Ask a parent to pay" in the app and you get a ready-made message with a secure payment link to send them.

Can I see how my teen is going?

Yes. In their account, your teen can add your email for a weekly progress report. You get one email asking you to confirm, and nothing more unless you say yes. You can stop it any time.

How do I get Kestrel at my school?

Ask your teacher to email us for a free one-term pilot, or show them this page.

Your HSC, levelled up.