# The Matrix Mentor vs eigenCalc

The clearest difference is update cadence: The Matrix Mentor at every 4 days against eigenCalc's monthly. eigenCalc's advantage is iOS requirement (15.5 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

The Matrix Mentor ships an update every 4 days, eigenCalc monthly. The most recent releases landed on September 9, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | The Matrix Mentor | eigenCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Size | 3 MB | 2 MB |
| Requires iOS | 17.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Edwin Veger](https://appshunter.io/developer/1025412576) | [Luis Acevedo-Arreguin](https://appshunter.io/developer/1642773653) |

## What reviewers say

### The Matrix Mentor

[App page](https://appshunter.io/ios/app/the-matrix-mentor/id6479958283)

**Features:** macOS Compatibility

**In-app purchases:** none


### eigenCalc

[App page](https://appshunter.io/ios/app/eigencalc/id6503222785)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is The Matrix Mentor free?

The Matrix Mentor is free to download, with no in-app purchases.

### Is eigenCalc free?

eigenCalc is free to download, with no in-app purchases.

### Do The Matrix Mentor or eigenCalc have ads?

Neither The Matrix Mentor nor eigenCalc shows ads.

### Which is updated more often, The Matrix Mentor or eigenCalc?

The Matrix Mentor ships an update every 4 days, and eigenCalc monthly. Most recently, The Matrix Mentor was updated on September 9, 2026 and eigenCalc on September 17, 2026.

---

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