# OTR Diagnostics vs Ancel Trucker

The clearest difference is rating: OTR Diagnostics at 4.0 against Ancel Trucker's 2.2. OTR Diagnostics also leads on review sentiment (55% vs 19%) and update cadence (fortnightly vs every 6 weeks). Ancel Trucker's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (15 vs 17.6). 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.

OTR Diagnostics holds the better App Store score, 4.0 against 2.2. Both are backed by a comparable volume of ratings — 99 and 28 respectively. Written reviews point the same way: 55% of OTR Diagnostics's written reviews are positive against 19% of Ancel Trucker's.

OTR Diagnostics ships an update fortnightly, Ancel Trucker every 6 weeks. Both last shipped on September 23, 2026.

## The numbers

| Metric | OTR Diagnostics | Ancel Trucker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (99 ratings)](https://appshunter.io/ios/app/otr-diagnostics/id1508165885/reviews)** | [2.2 (28 ratings)](https://appshunter.io/ios/app/ancel-trucker/id6444299282/reviews) |
| Number of ratings | **99** | 28 |
| Positive reviews | **55.2% of reviews** | 19.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 266 MB | 167 MB |
| Requires iOS | 17.6 | **15** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OTR Performance](https://appshunter.io/developer/1508165884) | [OBDSPACE TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1434956144) |

## 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


### Ancel Trucker

[App page](https://appshunter.io/ios/app/ancel-trucker/id6444299282)

This app allows users to connect to a vehicle's OBD system via Bluetooth or Wi-Fi. It provides one-key password-free login to read and clear fault codes, and perform special functions like DPF regeneration for heavy-duty trucks.

**Highlights:** One-key password-free login, Bluetooth/Wi-Fi connection to device, Read vehicle OBD data stream, Read and clear fault codes, DPF regeneration, Special function operation

**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 Ancel Trucker free?

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

### Which has better reviews, OTR Diagnostics or Ancel Trucker?

OTR Diagnostics is rated higher. OTR Diagnostics averages 4.0 out of 5 from 99 ratings, while Ancel Trucker averages 2.2 from 28 ratings.

### Do OTR Diagnostics or Ancel Trucker have ads?

Neither OTR Diagnostics nor Ancel Trucker shows ads.

### Which is updated more often, OTR Diagnostics or Ancel Trucker?

OTR Diagnostics ships an update fortnightly, and Ancel Trucker every 6 weeks. Most recently, OTR Diagnostics was updated on September 23, 2026 and Ancel Trucker on September 23, 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.*