# Visitor HSSE vs OTR Diagnostics

The clearest difference is rating: OTR Diagnostics at 4.0 against Visitor HSSE's 2.7. OTR Diagnostics also leads on review sentiment (55% vs 33%) and ratings volume (99 vs 25). Visitor HSSE's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (13.0 vs 17.6). 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.

OTR Diagnostics holds the better App Store score, 4.0 against 2.7. Both are backed by a comparable volume of ratings — 25 and 99 respectively. Written reviews point the same way: 33% of Visitor HSSE's written reviews are positive against 55% of OTR Diagnostics's.

Visitor HSSE ships an update every 3 weeks, OTR Diagnostics fortnightly. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Visitor HSSE | OTR Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (25 ratings)](https://appshunter.io/ios/app/visitor-hsse/id1303677812/reviews) | **[4.0 (99 ratings)](https://appshunter.io/ios/app/otr-diagnostics/id1508165885/reviews)** |
| Number of ratings | 25 | **99** |
| Positive reviews | 33.3% of reviews | **55.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 48 MB | 267 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [A.P. MOLLER - MAERSK](https://appshunter.io/developer/672653767) | [OTR Performance](https://appshunter.io/developer/1508165884) |

## What reviewers say

### Visitor HSSE

[App page](https://appshunter.io/ios/app/visitor-hsse/id1303677812)

This app helps visitors understand safety regulations for port and terminal access. It includes a quiz to test knowledge before entry is granted. Currently supports multiple international terminal locations.

**Highlights:** Safety regulation information, HSSE Induction quiz, Terminal-specific access, Visitor knowledge testing, Multiple international locations

**Features:** macOS Compatibility

**In-app purchases:** none


### OTR Diagnostics

[App page](https://appshunter.io/ios/app/otr-diagnostics/id1508165885)

This app helps heavy-duty truck owners diagnose and resolve common issues like fault codes, regen problems, and derates. It provides plain-language explanations of error codes, allows for bi-directional commands to fix issues, and monitors live truck data to prevent downtime.

**Highlights:** AI-powered fault code explanation, Bi-directional commands for repairs, Reset active/inactive fault codes, Run forced DPF/SCR regens, Live data monitoring, Fault code history tracking

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

**In-app purchases:** none

**What reviewers like**

- 💰 Saves money on repairs
- 🛠️ Clears fault codes
- 🔄 Performs forced regens
- ✅ Works with various engines
- 👍 Easy to use

**What reviewers complain about**

- 💸 Overpriced
- 🐛 Buggy and unstable app
- 🔌 Frequent Bluetooth disconnects
- 📉 Updates cause problems
- ❌ Some features disappeared after updates

**Reported bugs**

- App constantly disconnects from device
- Generic code option disappeared
- Forced regen is no longer consistent
- AI assistant not working
- App asks to do things not available in app

**Requested features**

- Remember email address for login
- Allow offline functionality without data connection
- Add option to change speed
- More detailed diagnostic information
- Allow basic subscription to work on multiple VINs


## Frequently asked questions

### Is Visitor HSSE free?

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

### Is OTR Diagnostics free?

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

### Which has better reviews, Visitor HSSE or OTR Diagnostics?

OTR Diagnostics is rated higher. Visitor HSSE averages 2.7 out of 5 from 25 ratings, while OTR Diagnostics averages 4.0 from 99 ratings.

### Do Visitor HSSE or OTR Diagnostics have ads?

Neither Visitor HSSE nor OTR Diagnostics shows ads.

### Which is updated more often, Visitor HSSE or OTR Diagnostics?

Visitor HSSE ships an update every 3 weeks, and OTR Diagnostics fortnightly. Most recently, Visitor HSSE was updated on October 16, 2026 and OTR Diagnostics on October 15, 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.*