Start Math
Trace back to where you stuck
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Mock-exam sets for the 2026 assessments and a new Challenge tier: 90 set items plus 212 exam-style problems on top of 13 subjects and 4,610 problems.
School mathematics as one path: concept, worked example, practice, review.
No account. No internet required.
■ It traces back to where you actually got stuck
If you keep missing quadratic equations because the real gap is in factoring,
a hundred more will not help. This app collects the concepts behind your wrong answers,
walks back the prerequisites and says where to restart.
A lesson you reach that way opens even if locked, and never locks again —
pointing at the gap and then closing the door would be pointless.
■ Wrong answers come back just as you are about to forget
Every miss goes into your review notebook and returns after 1, 3, 7, 16 and 35 days.
Get it right and the interval grows; miss it again and it restarts.
You can tag why you missed it — an arithmetic slip, a concept you did not know, or a
misread question. Slips do not count against concept mastery, and wait three days
instead of one. Why you missed it matters more than how many you missed.
■ Formulas are typeset, and read aloud properly
No formula images. Rule thickness, radical slant and exponent size follow
typesetting rules, so nothing blurs when you enlarge the text. With VoiceOver they are
read in natural Korean word order.
Concept-card graphs have draggable coefficients: that the sign of a flips a parabola
is faster to see once than to read twice.
■ When the exam is two weeks away
Enter the scope and the minutes you can give each day. The plan follows prerequisite
order and keeps the last two days for review. If time is short, it drops the hardest
problems and says so.
■ Room to work it out by hand
Every problem has a writing space beside it; on iPad the screen splits, problem on one
side and your working on the other. Your working is saved per problem and returns in
the wrong-answer notebook — where it went wrong matters more than what.
Handwriting is not graded.
■ One card for a parent
A week's work can be sent as one card — time studied, problems solved, lessons
finished. No rank, no comparison, nothing sent automatically: the student taps to
send and sees first what will go.
■ Also
· Concept map — what you know, what you do not, and the path
· Statistics — streak, progress, causes of mistakes, solving time
· Answer statistics — how often a problem is missed. Off by default
· Daily problem widget — free-section only, so a tap never hits a paywall
· Review reminders — off by default; at most once a day
· iCloud sync · iPad two-pane · Dark Mode · Dynamic Type
■ What is included
Thirteen subjects of the Korean curriculum: middle school years 1 to 3, Common Math
1 and 2, Algebra, Calculus I, Probability & Statistics, Calculus II, Geometry, Math
for AI, Math for Economics and Math for Work — 91 units, 461 lessons, 4,610 problems.
Mock-exam sets for the March, June and September 2026 assessments: no original
questions, but a walkthrough and an original look-alike problem per item (90).
A fifth tier, Challenge: 212 exam-style problems spanning several lessons
of a unit, four per unit in the seven high-school subjects.
All 143 graphs and diagrams are drawn from coordinates, not images. Concept
cards come in five kinds, including misconception cards.
■ How much is free
The opening lessons of every unit are entirely free — concepts, examples, practice.
One further lesson gives concepts and worked examples, with the paywall at its
problems. See how the app teaches before you buy.
■ Purchases
One pack per subject — buy only the years you need. One-time purchases, not
subscriptions: nothing recurs, nothing expires. Family Sharing is supported;
content updates are free to everyone who bought.
■ Privacy
No sign-up, no login, no developer server, no ads. Anonymous usage statistics —
no advertising identifier, nothing tied to you. Reporting a problem sends what you
wrote and the answer you gave, shown before you tap. Answer statistics are off by
default; turned on, your answer goes once per problem. The rest stays on your device.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Challenge problems for middle school, years 1 to 3.
· Four per unit, 92 in all — one step deeper inside the curriculum: divisor
counts, coprimes, skew lines, repeating decimals, circumcenter and incenter
· They live in the supplement layer, so progress and the free section are
untouched; owners see them as new problems
Every unit now says where it is used.
· Logarithms in decibels and earthquake magnitude, the dot product in search
engine similarity, geometric sequences in loan repayment — three or four
real uses for each of the 91 units
· Each use can jump to the related lesson inside the app, across subjects
· Visible on locked units too
The developer, CHUNGKIL KIM, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- CHUNGKIL KIM
- Size
- 35.3 MB
- Category
- Education
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- Korean
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Math for Work $5.99
- Math for Economics $5.99
- Math for AI $5.99
- Calculus II $6.99
- Geometry $6.99
- Probability & Statistics $6.99
- Algebra $6.99
- Calculus I $6.99
- Common Math 2 $5.99
- Common Math 1 $5.99
- Copyright
- © CHUNGKIL KIM
