# LVM Tag vs OTR Diagnostics

The clearest difference is update cadence: OTR Diagnostics at fortnightly against LVM Tag's every 5 months. LVM Tag's advantage is 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.

LVM Tag ships an update every 5 months, OTR Diagnostics fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | LVM Tag | OTR Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (99 ratings)](https://appshunter.io/ios/app/otr-diagnostics/id1508165885/reviews)** |
| Number of ratings | — | **99** |
| Positive reviews | — | 55.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 35 MB | 267 MB |
| Requires iOS | **15** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LVM Tech Inc.](https://appshunter.io/developer/1122500170) | [OTR Performance](https://appshunter.io/developer/1508165884) |

## What reviewers say

### LVM Tag

[App page](https://appshunter.io/ios/app/lvm-tag/id1139586963)

**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 LVM Tag free?

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

### Is OTR Diagnostics free?

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

### Do LVM Tag or OTR Diagnostics have ads?

Neither LVM Tag nor OTR Diagnostics shows ads.

### Which is updated more often, LVM Tag or OTR Diagnostics?

LVM Tag ships an update every 5 months, and OTR Diagnostics fortnightly. Most recently, LVM Tag was updated on October 26, 2026 and OTR Diagnostics on October 24, 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.*