# Circle Mobile TMS vs OTR Diagnostics

The clearest difference is monetization model: Circle Mobile TMS at free against OTR Diagnostics's free with in-app purchases. Circle Mobile TMS also leads on review sentiment (75% vs 55%) and rating (4.2 vs 4.0). OTR Diagnostics's advantage is update cadence (fortnightly vs every 6 weeks) and ratings volume (99 vs 25). 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.

Circle Mobile TMS holds the better App Store score, 4.2 against 4.0. Both are backed by a comparable volume of ratings — 25 and 99 respectively. Written reviews point the same way: 75% of Circle Mobile TMS's written reviews are positive against 55% of OTR Diagnostics's.

Circle Mobile TMS ships an update every 6 weeks, OTR Diagnostics fortnightly. The most recent releases landed on October 16, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Circle Mobile TMS | OTR Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (25 ratings)](https://appshunter.io/ios/app/circle-mobile-tms/id1245188096/reviews)** | [4.0 (99 ratings)](https://appshunter.io/ios/app/otr-diagnostics/id1508165885/reviews) |
| Number of ratings | 25 | **99** |
| Positive reviews | **75.0% of reviews** | 55.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 42 MB | 267 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Full Circle TMS](https://appshunter.io/developer/1245188095) | [OTR Performance](https://appshunter.io/developer/1508165884) |

## What reviewers say

### Circle Mobile TMS

[App page](https://appshunter.io/ios/app/circle-mobile-tms/id1245188096)

This app provides truck drivers with dispatch information, including pick-up and delivery details, special instructions, and event updates. Drivers can automatically notify dispatch upon arrival, loading, and delivery, and receive real-time position updates.

**Highlights:** View pick-up and delivery events, Receive location details and instructions, Automatic arrival and departure updates, Real-time position tracking, Send load information, Proof of Delivery signature capture

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

**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 Circle Mobile TMS free?

Circle Mobile TMS 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, Circle Mobile TMS or OTR Diagnostics?

Circle Mobile TMS is rated higher. Circle Mobile TMS averages 4.2 out of 5 from 25 ratings, while OTR Diagnostics averages 4.0 from 99 ratings.

### Do Circle Mobile TMS or OTR Diagnostics have ads?

Neither Circle Mobile TMS nor OTR Diagnostics shows ads.

### Which is updated more often, Circle Mobile TMS or OTR Diagnostics?

Circle Mobile TMS ships an update every 6 weeks, and OTR Diagnostics fortnightly. Most recently, Circle Mobile TMS 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.*