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KJiny

About this app

A CSAT Math study app for adults.

Math, which you drifted away from during your school days—now, start again at your own pace.

There is no exam pressure or ranking. One problem today is enough.

■ How to Study

· Lightly review key formulas first with concept cards

· Step-by-step hints if you get stuck (direction only, with the answer hidden)

· Immediate grading and explanations after solving (expand to view detailed solutions)

· Incorrect problems are automatically collected in the ‘Problems to Resolve’ section

■ Follow the CSAT Curriculum

Middle School Math · High School Common Math · Math I · Math II · Probability and Statistics · Calculus · Geometry

Step-by-step through Subject → Unit → Detailed Unit → Difficulty Level (Concept Check ~ Actual CSAT).

■ Just like the real thing, Mock CSAT

Time-limited mock exams consisting of Common subjects plus one elective subject. Includes raw scores and explanations for each question.

Questions that have already been solved are excluded, and questions are primarily based on ‘unsolved problems.’

■ Features to Support Consistency

· Attendance check and consecutive study days

· Daily study reminders at set times (optional)

· Record of problems solved, accuracy rate, and progress by subject

Start right now, with just one problem today.

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### New Version Memo (What's New, 1.0.0)

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This is the first launch of ‘Mathematics for Adults.’

From middle school to the CSAT, concepts, hints, explanations, mock CSATs, and attendance all in one place.

Try starting lightly with just one problem today!

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### Other Inputs

- Support URL: `https://duo.jiny.shop/mfa/support`

- Marketing URL (Optional): Can be left blank

- Copyright: `© 2026 Kim Jiny` (Example)

- Age Rating: Respond to the survey based on Age 4 (Education, No Sensitive Content)

- Encryption: `ITSAppUsesNonExemptEncryption=false` already set → Select "Use standard encryption only"

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## 2. Google Play (Android)

### App Name (Title, 30 characters)

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Adult Math

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### Short Description (80 characters)

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A pressure-free math learning app to restart from middle school to the CSAT at an adult's pace. Concepts · Hints · Explanations · Mock CSAT.

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### Detailed Description (Full description, 4,000 characters)

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A CSAT math learning app for adults, ‘Math for Adults’.

Restart math at your own pace, without the pressure of exams, after drifting away from it during your school days. One problem today is enough.

▶ How to Study

· Lightly review key formulas and definitions first using concept cards

· Step-by-step hints if you get stuck (providing only the direction while hiding the answer)

· Immediate grading and explanations after solving; view detailed solutions

· Incorrect problems are automatically collected in ‘Problems to Solve Again’ for review

▶ Follows the CSAT Curriculum

Middle School Math · High School Common Math · Math I · Math II · Probability and Statistics · Calculus · Geometry

Progresses step-by-step in the order of Subject → Unit → Detailed Unit → Difficulty Level (Concept Check · Basic · Representative · Applied · CSAT Basic · CSAT Practice)

▶ Just Like the Real Test, Mock CSAT

A time-limited mock exam consisting of Common (Mathematics I & II) + 1 Elective Subject. It provides raw scores and explanations for each question, and features questions focused on ‘unsolved problems,’ excluding those already solved.

▶ Features to Support Consistency

· Attendance check and consecutive study days (Streak)

· Daily study reminders at set times (optional)

· Recording of number of problems solved, accuracy rate, and progress by subject

▶ Suitable for:

· Office workers who want to revisit math from their school days

· Parents reviewing concepts to explain them to their children

· Those needing math foundations for GEDs, university transfers, etc.

· Those who enjoy using their brains as a hobby

Start with just one problem today without any pressure.

What’s new

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