# Density vs A

The clearest difference is rating: A at 5.0 against Density's 2.5. A also leads on update cadence (every 10 months vs every 75 months) and device support (4 vs 2). Density's advantage is in-app purchases (none vs 1) and ratings volume (8 vs 1). On price, ads and monetization model there is nothing between them.

Both are free to download. A sells 1 one-off in-app purchase. Density asks for nothing beyond the download.

A holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: Density has 8 ratings behind it against 1, so its average is the more settled of the two.

Density ships an update every 75 months, A every 10 months. The most recent releases landed on September 28, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Density | A |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (8 ratings)](https://appshunter.io/ios/app/density/id458423388/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/a-number/id1547102751/reviews)** |
| Number of ratings | **8** | 1 |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 75 months | **Every 10 months** |
| Monetization | Free | Free |
| Size | 0 MB | 2 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Lance Henderson](https://appshunter.io/developer/348247919) | [Shabbir Ahmed](https://appshunter.io/developer/1083166021) |

## What reviewers say

### Density

[App page](https://appshunter.io/ios/app/density/id458423388)

This app calculates radiographic density variations for industrial radiographers and inspectors. It is designed to assist professionals working with ASME Section V standards in their density calculations.

**Highlights:** Radiographic density calculation, ASME Section V compliance, Industrial radiographer tool, Density variation calculations, Inspector utility

**Features:** macOS Compatibility

**In-app purchases:** none


### A

[App page](https://appshunter.io/ios/app/a-number/id1547102751)

This utility app calculates the A-Number for deposited weld metal based on its chemical composition. It simplifies the process of comparing weld metal composition against ASME Section IX standards, aiding in procedure qualification and ensuring compliance.

**Highlights:** Determines A-Number from chemical composition, Compares weld metal to ASME Section IX ranges, Aids in procedure qualification, Supports ASME Section IX 2023 Edition, Provides accurate results

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Non-Consumable Subscription | $1.99 | one-time |


## Frequently asked questions

### Is Density free?

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

### Is A free?

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

### Which has better reviews, Density or A?

A is rated higher. Density averages 2.5 out of 5 from 8 ratings, while A averages 5.0 from 1 ratings.

### Do Density or A have ads?

Neither Density nor A shows ads.

### Which is updated more often, Density or A?

Density ships an update every 75 months, and A every 10 months. Most recently, Density was updated on September 28, 2026 and A on September 22, 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.*