# OTR Diagnostics vs RoadRec

The clearest difference is rating: OTR Diagnostics at 4.0 against RoadRec's 1.7. OTR Diagnostics also leads on review sentiment (55% vs 16%) and update cadence (fortnightly vs monthly). RoadRec's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (12.0 vs 17.6). On price, ratings volume, 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 1.7. Both are backed by a comparable volume of ratings — 99 and 34 respectively. Written reviews point the same way: 55% of OTR Diagnostics's written reviews are positive against 16% of RoadRec's.

OTR Diagnostics ships an update fortnightly, RoadRec monthly. The most recent releases landed on September 23, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | OTR Diagnostics | RoadRec |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (99 ratings)](https://appshunter.io/ios/app/otr-diagnostics/id1508165885/reviews)** | [1.7 (34 ratings)](https://appshunter.io/ios/app/roadrec/id6504097445/reviews) |
| Number of ratings | **99** | 34 |
| Positive reviews | **55.2% of reviews** | 15.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 266 MB | 185 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OTR Performance](https://appshunter.io/developer/1508165884) | [EFORYOU INC](https://appshunter.io/developer/1703173310) |

## What reviewers say

### 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


### RoadRec

[App page](https://appshunter.io/ios/app/roadrec/id6504097445)

This utility app acts as a safety guard for your travels by connecting to a dash cam recorder via WiFi. It allows you to view, download, and save videos and pictures, including emergency recordings, directly to your phone. You can also adjust the recorder's settings through the application.

**Highlights:** Connects to dash cam via WiFi, View general and emergency videos, Save and download recordings, Manage pictures, Configure dash cam settings

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

**In-app purchases:** none


## Frequently asked questions

### Is OTR Diagnostics free?

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

### Is RoadRec free?

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

### Which has better reviews, OTR Diagnostics or RoadRec?

OTR Diagnostics is rated higher. OTR Diagnostics averages 4.0 out of 5 from 99 ratings, while RoadRec averages 1.7 from 34 ratings.

### Do OTR Diagnostics or RoadRec have ads?

Neither OTR Diagnostics nor RoadRec shows ads.

### Which is updated more often, OTR Diagnostics or RoadRec?

OTR Diagnostics ships an update fortnightly, and RoadRec monthly. Most recently, OTR Diagnostics was updated on September 23, 2026 and RoadRec on September 17, 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.*