# OTR Diagnostics vs Proformance Link

OTR Diagnostics and Proformance Link both sit at 4.0 stars, but that hides the real split: 100% of Proformance Link's written reviews are positive against 55% of OTR Diagnostics's. Proformance Link also leads on iOS requirement (15.0 vs 17.6). OTR Diagnostics's advantage is ratings volume (99 vs 4) and update cadence (weekly vs every 3 weeks). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.0 for OTR Diagnostics against 4.0 for Proformance Link. That said, the two scores are not equally well evidenced: OTR Diagnostics has 99 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 55% of OTR Diagnostics's written reviews are positive against 100% of Proformance Link's.

OTR Diagnostics ships an update weekly, Proformance Link every 3 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | OTR Diagnostics | Proformance Link |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (99 ratings)](https://appshunter.io/ios/app/otr-diagnostics/id1508165885/reviews) | [4.0 (4 ratings)](https://appshunter.io/ios/app/proformance-link/id6755274184/reviews) |
| Number of ratings | **99** | 4 |
| Positive reviews | 55.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free | Free |
| Size | 268 MB | 53 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [OTR Performance](https://appshunter.io/developer/1508165884) | [Proformance Diagnostics LLC](https://appshunter.io/developer/1852904316) |

## What reviewers say

### OTR Diagnostics

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

This diagnostic tool helps heavy-duty truck owners understand and resolve fault codes, perform crucial maintenance tasks like regens, and monitor live engine data. It aims to reduce downtime and avoid costly dealer visits by empowering users with detailed insights and control over their vehicle's systems.

**Highlights:** Reset active and inactive fault codes, Perform forced DPF/SCR regens, Understand fault codes in plain language, Monitor live engine data, Track fault code history, Bi-directional commands for repairs

**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


### Proformance Link

[App page](https://appshunter.io/ios/app/proformance-link/id6755274184)

This diagnostic tool connects to trucks via Bluetooth to read and clear fault codes, monitor data streams, and perform DPF regeneration and speed limit calibration. It supports a wide range of popular truck engine models.

**Highlights:** Fault code lookup and clearing, Real-time data stream viewing, DPF regeneration and reset, Speed limit calibration, Bluetooth connectivity, Supports multiple truck engine models

**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 Proformance Link free?

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

### Which has better reviews, OTR Diagnostics or Proformance Link?

OTR Diagnostics and Proformance Link are both rated 4.0 out of 5 on the App Store, from 99 and 4 ratings respectively.

### Do OTR Diagnostics or Proformance Link have ads?

Neither OTR Diagnostics nor Proformance Link shows ads.

### Which is updated more often, OTR Diagnostics or Proformance Link?

OTR Diagnostics ships an update weekly, and Proformance Link every 3 weeks. Most recently, OTR Diagnostics was updated on November 3, 2026 and Proformance Link on November 5, 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.*