# CAR OBD vs OBD Quest

The clearest difference is ads: CAR OBD at none against OBD Quest's shown. OBD Quest's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, rating, ratings volume and in-app purchases there is nothing between them.

Both are free to download. CAR OBD sells 5 one-off in-app purchases and OBD Quest sells 3 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for CAR OBD against 5.0 for OBD Quest. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

CAR OBD ships an update every 6 weeks, OBD Quest every 3 weeks. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | CAR OBD | OBD Quest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/car-obd/id6470771313/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/obd-quest/id6496854120/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 15 MB | 54 MB |
| Requires iOS | **13** | 14.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dongguan Shendu Research Intelligent Technology Co., Ltd.](https://appshunter.io/developer/1827187525) | [Shop Booster Ltd](https://appshunter.io/developer/1741157179) |

## What reviewers say

### CAR OBD

[App page](https://appshunter.io/ios/app/car-obd/id6470771313)

This utility app helps users manage car keys by facilitating the matching of existing keys and the addition of new ones. It supports both single key additions and batch processing for multiple keys.

**Highlights:** Match car keys, Add single car key, Batch add multiple keys, Supports iPhone and iPad

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OBD number recharge One | $3.00 | one-time |
| OBD number recharge Two | $6.00 | one-time |
| OBD number recharge three | $9.00 | one-time |
| OBD number recharge four | $12.00 | one-time |
| OBD number recharge five | $15.00 | one-time |


### OBD Quest

[App page](https://appshunter.io/ios/app/obd-quest/id6496854120)

Decode and understand car diagnostic trouble codes with this comprehensive interpreter. It provides detailed insights into fault codes, potential causes, and repair recommendations, complementing your existing OBD2 scanning tools. Access a vast database of codes across multiple languages and car brands to diagnose issues with confidence.

**Highlights:** Interpretation of over 85,000 OBD2 codes, Multilingual support (English, French, Italian, German, Portuguese, Spanish), Extensive coverage across auto makes and brands, Detailed insights for each code search, Unlimited code searches, AI-powered code interpretation

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Plan | $9.99 | per month |
| Yearly Pro Plan | $99.99 | per year |
| Pro Plan for 3 days only | $0.99 | one-time |


## Frequently asked questions

### Is CAR OBD free?

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

### Is OBD Quest free?

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

### Which has better reviews, CAR OBD or OBD Quest?

CAR OBD and OBD Quest are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do CAR OBD or OBD Quest have ads?

OBD Quest shows ads; CAR OBD does not.

### Which is updated more often, CAR OBD or OBD Quest?

CAR OBD ships an update every 6 weeks, and OBD Quest every 3 weeks. Most recently, CAR OBD was updated on October 20, 2026 and OBD Quest on October 19, 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.*