# AngularQM vs Implicit Differentiation Cal

The clearest difference is price: Implicit Differentiation Cal at Free against AngularQM's $4.99. Implicit Differentiation Cal also leads on update cadence (every 9 months vs every 49 months) and iOS requirement (13.0 vs 26.4). On ads, in-app purchases and device support there is nothing between them.

Implicit Differentiation Cal is free to download; AngularQM costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AngularQM ships an update every 49 months, Implicit Differentiation Cal every 9 months. The most recent releases landed on July 4, 2026 and December 5, 2025 respectively.

## The numbers

| Metric | AngularQM | Implicit Differentiation Cal |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| 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 9 months** |
| Monetization | Paid | — |
| Size | 5 MB | 24 MB |
| Requires iOS | 26.4 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gabriel Raffa](https://appshunter.io/developer/991109488) | [Ahmad Sattar](https://appshunter.io/developer/1458483953) |

## 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


### Implicit Differentiation Cal

[App page](https://appshunter.io/ios/app/implicit-differentiation-cal/id1607963477)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AngularQM free?

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

### Is Implicit Differentiation Cal free?

Implicit Differentiation Cal is free to download, with no in-app purchases.

### Do AngularQM or Implicit Differentiation Cal have ads?

Neither AngularQM nor Implicit Differentiation Cal shows ads.

### Which is updated more often, AngularQM or Implicit Differentiation Cal?

AngularQM ships an update every 49 months, and Implicit Differentiation Cal every 9 months. Most recently, AngularQM was updated on July 4, 2026 and Implicit Differentiation Cal on December 5, 2025.

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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.*