Only solutions that have passed verification are displayed. You can solve middle school through high school math step-by-step, and for examples, you can change the numbers and solve them again.
There are times when you have the answer, but you don't understand why it works that way.
The reason you get stuck on the next problem is not because you don't know the answer, but because you don't understand why you skipped that one line.
The math solution AI shows the process along with the answer.
It performs only one step at a time, explains why that step is done that way, and points out in advance what people get wrong there.
■ Only solutions that pass verification are displayed.
It checks the solution by substituting the obtained answer back into the original equation.
If verification fails, it does not display the answer but informs you that you "could not solve it."
To prevent users from confidently presenting plausible-looking incorrect answers, it always performs a back-and-forth check before exiting the screen.
Equations are verified by substituting the solution; inequalities by plugging values into the inside, outside, and boundaries of the interval; factorization is verified by expanding it again; and differentiation is verified by comparing with numerical differentiation.
The "Verification Complete" badge next to the answer signifies this.
** ■ Points out common mistakes in advance
- Why the inequality sign flips when dividing by a negative number (it is easy to understand if you think of the entire number line being flipped)
- The mistake of omitting 2ab in the middle of (a+b)²
- The mistake of forgetting to change the sign when transposing terms
- The fact that the denominator in the quadratic formula is 2a instead of a
- Extraneous roots that form when squaring an irrational equation
- The value that makes the denominator zero in a rational equation
- The condition for the argument of a logarithmic equation
- The mistake of omitting the derivative in the chain rule
- The order of F(b) − F(a) in definite integrals
- The + C in indefinite integrals
We explain the points where actual deductions occur during the exam at that stage.
■ Scope Covered (2022 Revised Curriculum)
Middle School — Prime Factorization, Factors and Multiples, Four Arithmetic Operations with Integers and Rational Numbers, Linear Equations, Linear Inequalities, Systems of Linear Equations (Elimination and Substitution), Multiplication Formulas, Factorization, Quadratic Equations (Factorization, Quadratic Formula, Perfecting the Square), Square Roots and Rationalization of the Denominator, Linear Functions
High School — Polynomial Division, Remainder Theorem and Factor Theorem, Synthetic Division, Complex Numbers and Imaginary Roots, Cubic and Quartic Equations, Biquadratic Substitution, Quadratic Inequalities, Absolute Value Equations and Inequalities, Irrational Equations, Rational Equations, Exponential Equations, Logarithmic Equations, Trigonometric Functions, Arithmetic, Geometric, and Difference Sequences
Calculus — Limits of Functions (0/0 Indeterminate), Differentiation (Powers, Products, Quotients, Composite), Extreme Values and Tables of Increase and Decrease, Tangents, Indeterminate Integrals Definite Integrals
■ Visually Verify with Graphs
You can view the results of your solution immediately as a graph.
Find and mark the points where the graph intersects the x-axis, local maxima and minima, the intersection points of two graphs, and asymptotes.
You do not need to memorize why the solution to a quadratic inequality lies between the two roots or outside of them after looking at the graph just once.
For discontinuous functions like 1/x, do not draw connecting lines. This is because if a non-existent line crosses the screen, the graph cannot be trusted.
■ 54 Formula Collections — "Where People Get Wrong" for Each Formula
We have compiled frequently used formulas from 7th grade to 12th grade, organized by grade and unit.
For each formula, we have included its meaning, when to use it, and where people often make mistakes.
This is because mistakes are far more common when the pitfalls are never pointed out than when the formula is simply unknown.
■ How to Insert Formulas
For exponents, press the xⁿ key to create a dotted square. Simply enter the number inside.
The same applies to fractions and radicals. If there are remaining fields to fill, the "Blank" button below the input window will take you to that spot.
If you are unfamiliar with the keyboard, you can simply take a problem from the Examples tab and change only the numbers.
■ 124 Example Problems by Unit — Select, Modify, and Solve
When you are at a loss as to what to input, simply open a unit to find a list of actual problems.
There are 20 units ranging from 7th grade prime factorization to 11th grade limits; you can filter by grade or search to find the problems.
All problems included here have been actually solved by the app and have passed verification.
Problems that cannot be solved after clicking are not included in the first place.
Also, the examples are not meant to be read.
When you select a problem, it goes into the input window rather than the answer. The numbers inside the equation appear as buttons,
and pressing them selects that position. If you change just one number and solve it again, you can see what changes.
How the answer changes if you change the 6 in x² − 5x + 6 = 0 to 8,
and why the inequality sign reverses if you change −3 in −3x + 6 ≥ 0 to 3 —
A single click is better than ten lines of explanation.
■ Similar Problems — Same Type, Different Numbers
The surest way to check if you understand a problem is to solve another similar one.
We generate a problem of the same type as the one you just solved right on the spot.
The app solves the generated problems first and only provides those that have passed verification.
We filter out problems with messy answers — because that is computational labor, not practice.
■ Error Notes and Weak Units
You can save your incorrect problems to solve again at any time.
As your records accumulate, we will tell you which units you are weak in.
However, we do not provide this information when the sample size is small — because saying "this unit is weak" based on getting two questions wrong is a guess, not an analysis.
■ Calculations Complete Within the Device
Problems are not sent to a server. There is no registration or account required.
Entered formulas and solution records are stored only within this device.
All features, except for ads, function exactly as they do in Airplane Mode. You can verify this for yourself.
■ Pricing
Answers and basic step-by-step solutions are always available regardless of subscription.
This is because if the learning app blocks answers, students will immediately open another app.
Free — 10 solutions per day, 2 graph functions, the entire formula collection, error notes
PLUS — Unlimited solutions, create similar problems, find weak chapters, overlay multiple graphs, save graph images, export solutions, ad-free
Some features are available for 6 hours after watching an ad once.
Full-screen ads are not displayed on the problem-solving screen or the solution viewing screen. This is to prevent interruptions while studying.
■ Permissions
- Internet — Used only for ads and payments
- Ad Identifier — Used by Google AdMob to display ads (not used for personalized ads)
No other permissions are required. There are no permissions for Location, Contacts, Storage, or Camera.
■ How to Use
1. Enter the equation using the math keyboard.
2. Press "Solve" to see the step-by-step solution.
3. Read the "Why" for each step — this is the key point.
4. Check the verification badge next to the answer to confirm if the solution is reliable.
5. Save the problems you got wrong in your error notebook and solve them again later.
■ For These Students
- Students who cannot understand the middle of a problem even after looking at the answer key.
- Students who keep making mistakes with the direction of inequalities.
- Students who are confused about when factorization works and when it doesn't.
- Students who lose points on exams for omitting condition checks.
- Parents who want to help their child with math homework but cannot remember the solution process.
- Students who want to create an error notebook but find it cumbersome to copy it down by hand.
■ Frequently Asked Questions
Q. Is it possible for the answer to be incorrect?
A. We perform verification before displaying the answer on the screen, but we cannot cover every type of problem. We will inform you if we cannot solve a problem. Please double-check your submitted answer yourself.
Q. Can I use it without internet?
A. Yes, it can. All calculations are performed within the device.
Q. The answer key looks different from the one in my school's answer key.
A. Notation methods may vary depending on the textbook. Please verify that the values match, and double-check your answers yourself before submitting them.
Q. Can I not see the answers if I don't subscribe?
A. You can. Answers, step-by-step solutions, and verification marks are available regardless of your subscription.
Q. If I change the numbers in the examples, won't the problems become unsolvable?
A. You can only change the coefficients and constants. The exponents are locked—because if x² becomes x⁵, it becomes a completely different problem from what was intended to be learned.
Available for ages 3 and up
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