# Metawatch vs OBD Diagnostics

The clearest difference is in-app purchases: Metawatch at none against OBD Diagnostics's 1. Metawatch also leads on ads (none vs shown) and update cadence (every 8 days vs monthly). On price and device support there is nothing between them.

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

Metawatch ships an update every 8 days, OBD Diagnostics monthly. The most recent releases landed on September 19, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Metawatch | OBD Diagnostics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 8 days** | Monthly |
| Size | 192 MB | 23 MB |
| Requires iOS | **12.1** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Xi'an Shenju Zhilian Network Technology Co., Ltd](https://appshunter.io/developer/1577900088) | [EJSmith](https://appshunter.io/developer/305393602) |

## What reviewers say

### Metawatch

[App page](https://appshunter.io/ios/app/metawatch/id1665557545)

**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 Metawatch free?

Metawatch 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 Metawatch or OBD Diagnostics have ads?

OBD Diagnostics shows ads; Metawatch does not.

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

Metawatch ships an update every 8 days, and OBD Diagnostics monthly. Most recently, Metawatch was updated on September 19, 2026 and OBD Diagnostics on September 18, 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.*