# MTags vs OBD Diagnostics

The clearest difference is in-app purchases: MTags at none against OBD Diagnostics's 1. MTags also leads on ads (none vs shown) and iOS requirement (11.0 vs 26.2). On price, update cadence and device support there is nothing between them.

Both are free to download. OBD Diagnostics sells 1 one-off in-app purchase. MTags asks for nothing beyond the download.

MTags ships an update every 2 months, OBD Diagnostics monthly. The most recent releases landed on September 29, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | MTags | OBD Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Monthly** |
| Size | 4 MB | 23 MB |
| Requires iOS | **11.0** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yunli-Wuli Network Co., Ltd](https://appshunter.io/developer/1052655663) | [EJSmith](https://appshunter.io/developer/305393602) |

## What reviewers say

### MTags

[App page](https://appshunter.io/ios/app/mtags/id1517564415)

**Features:** macOS Compatibility

**In-app purchases:** none


### OBD Diagnostics

[App page](https://appshunter.io/ios/app/obd-diagnostics/id6759762253)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked questions

### Is MTags free?

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

### Is OBD Diagnostics free?

OBD Diagnostics is free to download, with in-app purchases available.

### Do MTags or OBD Diagnostics have ads?

OBD Diagnostics shows ads; MTags does not.

### Which is updated more often, MTags or OBD Diagnostics?

MTags ships an update every 2 months, and OBD Diagnostics monthly. Most recently, MTags was updated on September 29, 2026 and OBD Diagnostics on October 6, 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.*