# 504 Express vs pobox

The clearest difference is update cadence: pobox at fortnightly against 504 Express's every 5 weeks. pobox also leads on iOS requirement (13.0 vs 15.6). 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.

504 Express ships an update every 5 weeks, pobox fortnightly. The most recent releases landed on October 17, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 504 Express | pobox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (6 ratings)](https://appshunter.io/ios/app/504-express/id6475613266/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Monetization | Free | — |
| Size | 58 MB | 18 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [SISOFTC](https://appshunter.io/developer/1302911829) | [VANESSA DE LA ROSA DIEPPA](https://appshunter.io/developer/1790246002) |

## What reviewers say

### 504 Express

[App page](https://appshunter.io/ios/app/504-express/id6475613266)

Track your online purchases from the moment they arrive at your Miami locker. Receive notifications and full traceability with status bars and location windows. Access comprehensive support to stay informed about your shipments.

**Highlights:** Package tracking from Miami locker, Real-time notifications, Full shipment traceability, Status bar progress updates, Location windows, Comprehensive customer support

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

**In-app purchases:** none


### pobox

[App page](https://appshunter.io/ios/app/pobox/id6741442684)

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

**In-app purchases:** none


## Frequently asked questions

### Is 504 Express free?

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

### Is pobox free?

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

### Do 504 Express or pobox have ads?

Neither 504 Express nor pobox shows ads.

### Which is updated more often, 504 Express or pobox?

504 Express ships an update every 5 weeks, and pobox fortnightly. Most recently, 504 Express was updated on October 17, 2026 and pobox on October 10, 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.*