# Linear Algebra: Matrix Solver — Step-by-Step Matrix Calculator

> Step-by-Step Matrix Calculator (iPhone/iPad app by 光浩 李.)

- Source: https://appshunter.io/ios/app/linear-algebra-matrix-solver/id6766080565 (this page in markdown: same URL + `.md`)
- Developer: [光浩 李](https://appshunter.io/developer/1576352133)
- Category: Utilities, Education
- Price: Free (on sale, was $9.99)
- Age rating: 4+
- Requires: iOS 17.6 · 73 MB
- Languages: American English
- Released: 2026-05-21
- Data updated: 2026-10-10
- User reviews in markdown: https://appshunter.io/ios/app/linear-algebra-matrix-solver/id6766080565/reviews.md

## What is Linear Algebra?

Linear Algebra turns any matrix problem into a teacher-style, step-by-step solution: what each step does, why it works, plus the final answer, a back-substitution check and exam tips. Free to download – every tool works and final answers are always free.

Note: the app interface and step-by-step explanations are in Simplified Chinese. Matrices, formulas and answers are standard math notation.

39 SOLVER TOOLS
• Exam essentials one tap away: determinant, inverse matrix, systems of linear equations, rank, eigenvalues & eigenvectors, diagonalization, quadratic form to canonical form, reduced row echelon form (RREF).
• Organized by chapter: determinants & matrix operations, elementary row operations & rank, linear systems, vector sets, eigenvalues & quadratic forms, polynomials.
• Advanced matrix theory: Jordan normal form, singular value decomposition (SVD), LU decomposition, Smith normal form, full-rank factorization, Moore–Penrose pseudoinverse, least squares, matrix norms and more.

STEP-BY-STEP, LIKE A TEACHER
• Every elementary row operation comes with an explanation, not just a wall of matrices.
• Linear systems get the complete general solution (particular solution + basis of the null space); eigenvalue problems list all eigenvectors; diagonalization gives P and Λ.
• The answer card sits on top, with automatic back-substitution checks and notes on common exam points and pitfalls.

STUDY CARDS
39 topics organized as key formulas → solving method → worked example → typical exam questions → common mistakes, each tagged by how often it appears on exams. Jump from any card straight into the solver to try a problem.

FREE AND FULL VERSION
• Free: all tools, final answers always free, 3 full step-by-step solutions per day.
• Full version (one-time purchase, not a subscription): unlimited access to every step and explanation, available on all your devices signed in with the same Apple ID, with Restore Purchases.

RUNS ON YOUR DEVICE
Problems are solved locally on your iPhone. Nothing is uploaded, and it works offline.

PRIVACY & SUPPORT
Privacy policy, FAQ and contact email are on the Support URL page below.


## Version history (last 4 releases)

### 1.2.1 — 2026-10-06

• Added an English App Store page.
• Bug fixes and improvements.

### 1.2 — 2026-09-26

• 全新老师式分步讲解：每一步都说明「为什么」，附答案卡、回代验算与考点提示
• 方程组给出完整通解，特征值 / 对角化 / 克莱姆法则等步骤全面补齐
• 推导台改版：最近使用 + 期末高频 + 按章节折叠，找工具更快
• 百科重写为考试向知识卡：必背公式、解题套路、例题、易错点
• 新增完整版（一次性买断）：不限次数查看完整推导；答案始终免费

### 1.1 — 2026-06-26

矩阵运算全新改版：
• 两个矩阵并排显示，各自独立输入，更直观
• 加、减、乘、数乘一键切换运算符
• 自动校验维度，无法相乘/相加时给出清晰提示，不再一头雾水

### 1.0 — 2026-05-22

No release notes.

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- [时间折叠](https://appshunter.io/ios/app/id6757955622)

All apps by 光浩 李: https://appshunter.io/developer/1576352133

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-10.*