# Matrix Wise Matrix Calculator — Your Go-To Matrix Calculator

> Your Go-To Matrix Calculator (iPhone/iPad app by Hideyuki Inada.)

- Source: https://appshunter.io/ios/app/matrix-wise-matrix-calculator/id6745982785 (this page in markdown: same URL + `.md`)
- Developer: [Hideyuki Inada](https://appshunter.io/developer/926079378)
- Category: Utilities, Education
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 6 MB
- Languages: English
- Released: 2025-05-18
- Data updated: 2026-06-03
- User reviews in markdown: https://appshunter.io/ios/app/matrix-wise-matrix-calculator/id6745982785/reviews.md

## What is Matrix Wise Matrix Calculator?

Easily perform and explore matrix operations on your iPhone or iPad. Work with 1, 2, or 3 matrices, each with custom dimensions up to 4×8, using an intuitive UI designed for clarity and speed.

Select the number of matrices, choose an operation from the picker, and input values using a built-in keyboard that supports numbers, letters, symbols, and functions. You can also enter full expressions like `1 + 1/2`, `pow(2, 3)`, or `sqrt(2)` directly into any matrix cell.

Need to fill a matrix quickly? Use dedicated buttons to initialize with zeroes, ones, random values, sequences, or the identity matrix. Perform essential tasks like transpose, determinant, and inverse with just a tap.

Whether you're a student, educator, or engineer, this app provides a powerful and flexible matrix interface right at your fingertips.

Key Features:
• Select 1, 2, or 3 matrices, each up to 4×8 in size
• Customize row and column count for each matrix  
• Choose operations:  
  ◦ Addition (+)  
  ◦ Subtraction (−)  
  ◦ Hadamard product (*)  
  ◦ Element-wise division (/)  
  ◦ Matrix multiplication (@)  
• Scalar and matrix operations (e.g. multiply a matrix with a scalar)
• Echelon form, row-echelon form, reduced row-echelon form transformation
• QR factoring (QR decomposition)
• LU decomposition with or without pivoting, Crout's algorithm without pivoting
• Tap to edit any matrix cell using a built-in keyboard  
• Keyboard positioning: no keyboard, left, center, right  
• Keyboard modes: numbers, letters, symbols, functions  
• Supports math expressions like `1 + 2/3`, `sqrt(2)`, `pow(2, 3)`  
• Matrix initialization buttons:  
  ◦ AC – All zeroes  
  ◦ ONE – All ones  
  ◦ RND – Random values  
  ◦ SEQ – Sequential values  
  ◦ EYE – Identity matrix  
  ◦ AAC – Set all matrices to zero  
• Special keys:  
  ◦ BS – Backspace  
  ◦ CLR – Clear selected element  
  ◦ PST – Paste the computed result into a matrix
• One-tap actions for:  
  ◦ Transpose (T)  
  ◦ Determinant (Det)  
  ◦ Inverse (Inv)  
• Expression parser supports basic math and functions:
  ◦ sqrt, pow, log, exp, sin, cos, tan, and more

Designed to make matrix math approachable and efficient, with support for both numeric input and expressions.

Note
For 3-matrix computation, the multiplication and division operators take precedence over addition and subtraction.
You can enter fractions as input (e.g., 1 + 1/2), but the output is always displayed in decimal form.


## Version history (last 4 releases)

### 3.1 — 2025-05-28

• Resolved an issue where entering values in the right columns of the rightmost matrix was difficult on the 3-matrix screen.
• Replaced the text edit field above matrices with a label field for displaying full element values, as direct text input using this field was not the primary method for editing and was cumbersome. The default popup keyboard already handles editing more effectively.

### 3.0 — 2025-05-27

Added support for LU decomposition with three options :
- LU without pivoting
- LU with pivoting
- LU without pivoting using Crout's reduction (for a wide or square matrix only)

### 2.0 — 2025-05-27

• Added support for operations between a scalar and a matrix  
• Added QR factorization  
• Added transformations to Echelon form, Row-Echelon form, and Reduced Row-Echelon form  
• Expanded matrix size support from 4×4 to 4×8

Bug Fix:
• Fixed an issue where pressing the AAC button did not fully reset all internal matrix data, leading to unintended results.

### 1.0 — 2025-05-18

No release notes.

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All apps by Hideyuki Inada: https://appshunter.io/developer/926079378

## Related topics

[matrix wise matrix calculator](https://appshunter.io/ios/topics/matrix-wise-matrix-calculator) · [hideyuki inada](https://appshunter.io/ios/topics/hideyuki-inada)

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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 2026-06-03.*