# Density vs JustPercent

The clearest difference is in-app purchases: Density at none against JustPercent's 1. Density also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.0). JustPercent's advantage is update cadence (every 3 months vs every 75 months). On price and device support there is nothing between them.

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

Density ships an update every 75 months, JustPercent every 3 months. The most recent releases landed on October 14, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Density | JustPercent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.5 (8 ratings)](https://appshunter.io/ios/app/density/id458423388/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 75 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 0 MB | 30 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lance Henderson](https://appshunter.io/developer/348247919) | [DONGSOO LEE](https://appshunter.io/developer/1868670088) |

## 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


### JustPercent

[App page](https://appshunter.io/ios/app/justpercent-3s-easy-calc/id6759853643)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Upgrade | $1.99 | one-time |


## Frequently asked questions

### Is Density free?

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

### Is JustPercent free?

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

### Do Density or JustPercent have ads?

JustPercent shows ads; Density does not.

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

Density ships an update every 75 months, and JustPercent every 3 months. Most recently, Density was updated on October 14, 2026 and JustPercent on October 24, 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.*