# OBD Quest vs GuardKit

The clearest difference is ads: GuardKit at none against OBD Quest's shown. GuardKit also leads on ratings volume (3 vs 1). OBD Quest's advantage is device support (3 vs 1) and iOS requirement (14.0.0 vs 26.0). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. OBD Quest sells 3 in-app purchases, starting at $9.99 per month and GuardKit sells 1 one-off in-app purchase. 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 OBD Quest against 5.0 for GuardKit. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | OBD Quest | GuardKit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/obd-quest/id6496854120/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/guardkit/id6757253477/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 54 MB | 2 MB |
| Requires iOS | **14.0.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shop Booster Ltd](https://appshunter.io/developer/1741157179) | [BLUR TEC LLC](https://appshunter.io/developer/1822100026) |

## What reviewers say

### 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 |


### GuardKit

[App page](https://appshunter.io/ios/app/guardkit/id6757253477)

This app monitors your device for unexpected movement or interaction while you're away. It analyzes motion signals and can optionally detect nearby audio activity levels, providing a timeline of events. All data is stored locally on your device for enhanced privacy.

**Highlights:** Motion-based activity indicators, Optional audio activity level detection, Chronological event timelines, Local-first data storage, User control over permissions

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Unlock | $4.99 | one-time |


## Frequently asked questions

### Is OBD Quest free?

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

### Is GuardKit free?

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

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

OBD Quest and GuardKit are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do OBD Quest or GuardKit have ads?

OBD Quest shows ads; GuardKit does not.

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

OBD Quest ships an update every 3 weeks, and GuardKit every 3 weeks. Most recently, OBD Quest was updated on October 2, 2026 and GuardKit on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*