# AngularQM vs Arduino Science Journal

The clearest difference is price: Arduino Science Journal at Free against AngularQM's $4.99. Arduino Science Journal also leads on update cadence (every 3 months vs every 49 months) and ratings volume (1.1K vs 1). AngularQM's advantage is rating (5.0 vs 4.4) and in-app purchases (none vs 2). On ads and device support there is nothing between them.

Arduino Science Journal is free to download; AngularQM costs $4.99 up front. Arduino Science Journal sells 2 in-app purchases, starting at $7.99 per month. AngularQM asks for nothing beyond the download.

AngularQM holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Arduino Science Journal has 1.1K ratings behind it against 1, so its average is the more settled of the two.

AngularQM ships an update every 49 months, Arduino Science Journal every 3 months. The most recent releases landed on October 14, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | AngularQM | Arduino Science Journal |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/angularqm/id1319354337/reviews)** | [4.4 (1.1K ratings)](https://appshunter.io/ios/app/arduino-science-journal/id1518014927/reviews) |
| Number of ratings | 1 | **1.1K** |
| Positive reviews | — | 58.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 49 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 5 MB | 58 MB |
| Requires iOS | 26.4 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Gabriel Raffa](https://appshunter.io/developer/991109488) | [Arduino LLC](https://appshunter.io/developer/1599571672) |

## 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


### Arduino Science Journal

[App page](https://appshunter.io/ios/app/arduino-science-journal/id1518014927)

Transform your smartphone into a science notebook. Use your device's sensors and connect external hardware to gather real-time data, conduct experiments, and analyze findings. Ideal for students to explore the world scientifically.

**Highlights:** Use smartphone sensors, Connect external Arduino sensors, Record and analyze real-time data, Conduct interactive experiments, Enhance lesson plans, Cross-platform support

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Teacher Monthly Plan | $7.99 | per month |
| Yearly Teacher Plan | $63.99 | per year |

**What reviewers like**

- 👍 Simple and inspiring
- 🚀 Engaging science experience
- 🤩 Turned user into a true scientist
- 🤖 Good introduction to conducting experiments

**What reviewers complain about**

- 🐛 Keeps crashing
- 🐛 Blank screen issues
- 🐛 Sensors disappear or don't work
- 🤯 Overly complex and poor execution

**Reported bugs**

- App often crashes when trying to add sensors
- Sensor selection menu doesn't work
- Freezes on loading dashboards with blank screen
- Stopped working after iOS 15 update

**Requested features**

- iCloud sync
- CSV export for data analysis
- Velocity sensors using GPS
- Arduino sensor integration
- Buzzer with variable range


## Frequently asked questions

### Is AngularQM free?

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

### Is Arduino Science Journal free?

Arduino Science Journal is free to download, with in-app purchases available.

### Which has better reviews, AngularQM or Arduino Science Journal?

AngularQM is rated higher. AngularQM averages 5.0 out of 5 from 1 ratings, while Arduino Science Journal averages 4.4 from 1.1K ratings.

### Do AngularQM or Arduino Science Journal have ads?

Neither AngularQM nor Arduino Science Journal shows ads.

### Which is updated more often, AngularQM or Arduino Science Journal?

AngularQM ships an update every 49 months, and Arduino Science Journal every 3 months. Most recently, AngularQM was updated on October 14, 2026 and Arduino Science Journal on October 21, 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.*