# AngularQM vs Jake for stratigraphy

The clearest difference is price: Jake for stratigraphy at Free against AngularQM's $4.99. Jake for stratigraphy also leads on update cadence (every 22 months vs every 49 months). AngularQM's advantage is device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.

Jake for stratigraphy 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, Jake for stratigraphy every 22 months. The most recent releases landed on July 4, 2026 and August 19, 2026 respectively.

## The numbers

| Metric | AngularQM | Jake for stratigraphy |
| --- | --- | --- |
| 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 22 months** |
| Monetization | Paid | — |
| Size | 5 MB | 1 MB |
| Requires iOS | 26.4 | **26.0** |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Gabriel Raffa](https://appshunter.io/developer/991109488) | [Hunt Mountain Software](https://appshunter.io/developer/328710008) |

## 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


### Jake for stratigraphy

[App page](https://appshunter.io/ios/app/jake-for-stratigraphy/id1486090789)

**In-app purchases:** none


## Frequently asked questions

### Is AngularQM free?

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

### Is Jake for stratigraphy free?

Jake for stratigraphy is free to download, with no in-app purchases.

### Do AngularQM or Jake for stratigraphy have ads?

Neither AngularQM nor Jake for stratigraphy shows ads.

### Which is updated more often, AngularQM or Jake for stratigraphy?

AngularQM ships an update every 49 months, and Jake for stratigraphy every 22 months. Most recently, AngularQM was updated on July 4, 2026 and Jake for stratigraphy on August 19, 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.*