# AngularQM vs PE.Mech

The clearest difference is update cadence: PE.Mech at every 2 months against AngularQM's every 49 months. PE.Mech also leads on price ($0.99 vs $4.99) and iOS requirement (15.0 vs 26.4). AngularQM's advantage is device support (3 vs 1). On ads and in-app purchases there is nothing between them.

AngularQM costs $4.99 and PE.Mech $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AngularQM ships an update every 49 months, PE.Mech every 2 months. The most recent releases landed on July 4, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | AngularQM | PE.Mech |
| --- | --- | --- |
| Price | $4.99 | **$0.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/angularqm/id1319354337/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 49 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 5 MB | 35 MB |
| Requires iOS | 26.4 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Gabriel Raffa](https://appshunter.io/developer/991109488) | [巍 顾](https://appshunter.io/developer/1368599824) |

## What reviewers say

### AngularQM

[App page](https://appshunter.io/ios/app/angularqm/id1319354337)

This app helps quantum mechanics physicists quickly obtain matrix representations of angular momentum operators. It calculates matrices for J squared, the z component of J, and ladder operators for chosen total angular momentum values.

**Highlights:** Matrix representation of angular momentum operators, Calculates J squared matrices, Calculates Jz component matrices, Calculates ladder operator matrices (J+, J-), Supports various total angular momentum values (j), Visualizes matrix representations

**Features:** macOS Compatibility

**In-app purchases:** none


### PE.Mech

[App page](https://appshunter.io/ios/app/pemech/id1368599825)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AngularQM free?

AngularQM costs $4.99, with no in-app purchases.

### Is PE.Mech free?

PE.Mech costs $0.99, with no in-app purchases.

### Do AngularQM or PE.Mech have ads?

Neither AngularQM nor PE.Mech shows ads.

### Which is updated more often, AngularQM or PE.Mech?

AngularQM ships an update every 49 months, and PE.Mech every 2 months. Most recently, AngularQM was updated on July 4, 2026 and PE.Mech on September 11, 2026.

---

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