# Bulk Material Density Guide vs Eljen Design App

The clearest difference is update cadence: Eljen Design App at every 9 months against Bulk Material Density Guide's every 18 months. Eljen Design App also leads on iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Bulk Material Density Guide ships an update every 18 months, Eljen Design App every 9 months. The most recent releases landed on October 5, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Bulk Material Density Guide | Eljen Design App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/bulk-material-density-guide/id1454584553/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 9 months** |
| Monetization | Free | — |
| Size | 3 MB | 2 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sean Patterson](https://appshunter.io/developer/1437079753) | [New Wave Industries, Inc.](https://appshunter.io/developer/351683118) |

## What reviewers say

### Bulk Material Density Guide

[App page](https://appshunter.io/ios/app/bulk-material-density-guide/id1454584553)

This reference tool helps users find the bulk density of over 1700 materials. It's designed for professionals working with powders and bulk solids, assisting in conveyor specification and production system design. Search for materials by typing their name to quickly get estimated bulk density values.

**Highlights:** Search over 1700 materials, Find bulk density for powders and solids, Assists in conveyor specification, Aids in production system design, Quick search by typing material name, Provides estimated density values

**Features:** macOS Compatibility

**In-app purchases:** none


### Eljen Design App

[App page](https://appshunter.io/ios/app/eljen-design-app/id1462647780)

**In-app purchases:** none


## Frequently asked questions

### Is Bulk Material Density Guide free?

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

### Is Eljen Design App free?

Eljen Design App is free to download, with no in-app purchases.

### Do Bulk Material Density Guide or Eljen Design App have ads?

Neither Bulk Material Density Guide nor Eljen Design App shows ads.

### Which is updated more often, Bulk Material Density Guide or Eljen Design App?

Bulk Material Density Guide ships an update every 18 months, and Eljen Design App every 9 months. Most recently, Bulk Material Density Guide was updated on October 5, 2026 and Eljen Design App on October 3, 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.*