# Matrix Determinant Calculator vs Invoice Maker・Estimate Creator

The clearest difference is price: Invoice Maker・Estimate Creator at Free against Matrix Determinant Calculator's $0.29. Invoice Maker・Estimate Creator also leads on rating (2.0 vs 1.0) and update cadence (weekly vs every 34 months). Matrix Determinant Calculator's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.5). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Invoice Maker・Estimate Creator is free to download; Matrix Determinant Calculator costs $0.29 up front. Matrix Determinant Calculator sells 1 one-off in-app purchase and Invoice Maker・Estimate Creator sells 1 in-app purchase, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Invoice Maker・Estimate Creator holds the better App Store score, 2.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Matrix Determinant Calculator ships an update every 34 months, Invoice Maker・Estimate Creator weekly. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Matrix Determinant Calculator | Invoice Maker・Estimate Creator |
| --- | --- | --- |
| Price | $0.29 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/matrix-determinant-calculator/id6445841510/reviews) | **[2.0 (1 ratings)](https://appshunter.io/ios/app/invoice-makerestimate-creator/id6753728562/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 34 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 29 MB | 14 MB |
| Requires iOS | **13.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) | [Arlo Balme](https://appshunter.io/developer/1802967466) |

## What reviewers say

### Matrix Determinant Calculator

[App page](https://appshunter.io/ios/app/matrix-determinant-calculator/id6445841510)

This tool calculates the determinant of square matrices of any size. Input matrices manually or in various formats, and get clear results with calculation steps. Useful for math, science, and engineering.

**Highlights:** Calculate determinants for 2x2, 3x3, and NxN matrices, User-friendly interface for matrix input, Supports manual matrix entry, Uses algorithms like Gaussian elimination, Displays clear results and calculation steps, Lifetime premium in-app purchase available

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime | $5.99 | one-time |


### Invoice Maker・Estimate Creator

[App page](https://appshunter.io/ios/app/invoice-makerestimate-creator/id6753728562)

Create, send, and manage professional invoices, quotes, and receipts quickly and easily. Organize all your billing documents in one place to improve cash flow and get paid faster. Ideal for freelancers and small businesses seeking a simple, efficient billing solution.

**Highlights:** Smart digital invoicing, Fast and simple billing, One-tap invoice creation, Organized invoice dashboard, Printable documents (subscription), Customizable with logo and business details

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Unlimited Access | $6.99 | per 7 days |


## Frequently asked questions

### Is Matrix Determinant Calculator free?

Matrix Determinant Calculator costs $0.29, and also offers in-app purchases.

### Is Invoice Maker・Estimate Creator free?

Invoice Maker・Estimate Creator is free to download, with in-app purchases available.

### Which has better reviews, Matrix Determinant Calculator or Invoice Maker・Estimate Creator?

Invoice Maker・Estimate Creator is rated higher. Matrix Determinant Calculator averages 1.0 out of 5 from 1 ratings, while Invoice Maker・Estimate Creator averages 2.0 from 1 ratings.

### Do Matrix Determinant Calculator or Invoice Maker・Estimate Creator have ads?

Neither Matrix Determinant Calculator nor Invoice Maker・Estimate Creator shows ads.

### Which is updated more often, Matrix Determinant Calculator or Invoice Maker・Estimate Creator?

Matrix Determinant Calculator ships an update every 34 months, and Invoice Maker・Estimate Creator weekly. Most recently, Matrix Determinant Calculator was updated on October 12, 2026 and Invoice Maker・Estimate Creator on October 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*