# IUOE 520 vs Ironworkers 378

The clearest difference is rating: IUOE 520 at 4.7 against Ironworkers 378's 4.2. IUOE 520 also leads on ratings volume (90 vs 14). Ironworkers 378's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

IUOE 520 holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: IUOE 520 has 90 ratings behind it against 14, so its average is the more settled of the two.

IUOE 520 ships an update every 5 months, Ironworkers 378 every 4 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | IUOE 520 | Ironworkers 378 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (90 ratings)](https://appshunter.io/ios/app/iuoe-520/id1488217530/reviews)** | [4.2 (14 ratings)](https://appshunter.io/ios/app/ironworkers-378/id6443974679/reviews) |
| Number of ratings | **90** | 14 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | Free | Free |
| Size | 108 MB | 118 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Operating Engineers Local 520](https://appshunter.io/developer/1488217529) | [INTERNATIONAL ASSOCIATION OF BRIDGE, STRUCTURAL, ORNAMENTAL & REINFORCING IRON WORKERS (CA)](https://appshunter.io/developer/1590656882) |

## What reviewers say

### IUOE 520

[App page](https://appshunter.io/ios/app/iuoe-520/id1488217530)

This app provides union members with easy access to important information about their benefits, news, and contract updates. Members can also find details on training, discounts, and provide feedback directly to the union.

**Highlights:** General news and updates, Contract-specific information, Fringe benefits details, Training and course listings, Union member discounts, Membership feedback surveys

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

**In-app purchases:** none


### Ironworkers 378

[App page](https://appshunter.io/ios/app/ironworkers-378/id6443974679)

This app serves as a resource for members of Ironworkers 378, providing access to union news, industry updates, and important contact information. It aims to educate and empower members by detailing available benefits and facilitating communication within the union.

**Highlights:** General news and updates, Industry and contract specific information, Call board integration, Contact information, Report violations, Political action and organizing tools

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is IUOE 520 free?

IUOE 520 is free to download, with no in-app purchases.

### Is Ironworkers 378 free?

Ironworkers 378 is free to download, with no in-app purchases.

### Which has better reviews, IUOE 520 or Ironworkers 378?

IUOE 520 is rated higher. IUOE 520 averages 4.7 out of 5 from 90 ratings, while Ironworkers 378 averages 4.2 from 14 ratings.

### Do IUOE 520 or Ironworkers 378 have ads?

Neither IUOE 520 nor Ironworkers 378 shows ads.

### Which is updated more often, IUOE 520 or Ironworkers 378?

IUOE 520 ships an update every 5 months, and Ironworkers 378 every 4 months. Most recently, IUOE 520 was updated on October 25, 2026 and Ironworkers 378 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.*