# E Numbers Guide vs Dirac equation

The clearest difference is in-app purchases: Dirac equation at none against E Numbers Guide's 4. Dirac equation also leads on ads (none vs shown). E Numbers Guide's advantage is iOS requirement (15.0 vs 17). On price and device support there is nothing between them.

Both are free to download. E Numbers Guide sells 4 in-app purchases, starting at $1.99 per month. Dirac equation asks for nothing beyond the download.

## The numbers

| Metric | E Numbers Guide | Dirac equation |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | — |
| Size | 228 MB | 5 MB |
| Requires iOS | **15.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Olga Ivanova](https://appshunter.io/developer/1733570435) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### E Numbers Guide

[App page](https://appshunter.io/ios/app/e-numbers-guide/id6478639811)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| en-au | $1.99 | per month |
| en-au | $1.99 | one-time |
| en-au | $5.99 | one-time |
| en-au | $59.99 | one-time |


### Dirac equation

[App page](https://appshunter.io/ios/app/dirac-equation/id6739155551)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is E Numbers Guide free?

E Numbers Guide is free to download, with in-app purchases available.

### Is Dirac equation free?

Dirac equation is free to download, with no in-app purchases.

### Do E Numbers Guide or Dirac equation have ads?

E Numbers Guide shows ads; Dirac equation does not.

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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.*