# Quadrant Magnetics Calculator vs Notebox

The clearest difference is rating: Quadrant Magnetics Calculator at 5.0 against Notebox's 4.3. Quadrant Magnetics Calculator also leads on in-app purchases (none vs 2) and iOS requirement (15.1 vs 17.0). Notebox's advantage is update cadence (every 2 days vs every 2 months) and ratings volume (6 vs 2). On price, ads and device support there is nothing between them.

Both are free to download. Notebox sells 2 in-app purchases, starting at $1.49 per month. Quadrant Magnetics Calculator asks for nothing beyond the download.

Quadrant Magnetics Calculator holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 2 and 6 respectively.

Quadrant Magnetics Calculator ships an update every 2 months, Notebox every 2 days. The most recent releases landed on October 12, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Quadrant Magnetics Calculator | Notebox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/quadrant-magnetics-calculator/id1326461266/reviews)** | [4.3 (6 ratings)](https://appshunter.io/ios/app/notebox-encrypted/id1536532586/reviews) |
| Number of ratings | 2 | **6** |
| Positive reviews | — | 85.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | **Free** | Freemium |
| Size | 26 MB | 49 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Quadrant International](https://appshunter.io/developer/1887506007) | [Guap Inc.](https://appshunter.io/developer/1439069409) |

## What reviewers say

### Quadrant Magnetics Calculator

[App page](https://appshunter.io/ios/app/quadrant-magnetics-calculator/id1326461266)

Calculate magnetic force, permeance coefficient, and demagnetizing factor for various magnet shapes. Input magnet dimensions and grade or Br value to get results based on computer simulation data.

**Highlights:** Calculate magnetic force, Calculate permeance coefficient, Calculate demagnetizing factor, Supports rectangular blocks, Supports axially magnetized rings, Supports axially magnetized cylinders

**In-app purchases:** none


### Notebox

[App page](https://appshunter.io/ios/app/notebox-encrypted/id1536532586)

This app offers a secure, block-based editor with Markdown support for local note-taking. For cross-device synchronization and real-time updates, a subscription unlocks cloud features with zero-knowledge encryption.

**Highlights:** Zero-knowledge encryption, Block-based editor, Markdown support, Local-only mode, Cross-device sync, Real-time updates

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Cloud Subscription | $1.49 | per month |
| Yearly Cloud Subscription | $14.99 | per year |


## Frequently asked questions

### Is Quadrant Magnetics Calculator free?

Quadrant Magnetics Calculator is free to download, with no in-app purchases.

### Is Notebox free?

Notebox is free to download, with in-app purchases available.

### Which has better reviews, Quadrant Magnetics Calculator or Notebox?

Quadrant Magnetics Calculator is rated higher. Quadrant Magnetics Calculator averages 5.0 out of 5 from 2 ratings, while Notebox averages 4.3 from 6 ratings.

### Do Quadrant Magnetics Calculator or Notebox have ads?

Neither Quadrant Magnetics Calculator nor Notebox shows ads.

### Which is updated more often, Quadrant Magnetics Calculator or Notebox?

Quadrant Magnetics Calculator ships an update every 2 months, and Notebox every 2 days. Most recently, Quadrant Magnetics Calculator was updated on October 12, 2026 and Notebox on September 30, 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.*