OBD Quest vs GuardKit
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OBD Quest
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.
- 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
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Unlock the ultimate power of OBD2 code interpretation with OBDQuest, your comprehensive solution for decoding, understanding and diagnosing car issues. Whether you're looking up a specific DTC fault code definition, or utilizing an OBD2 car scanner, OBDQuest will be your work companion you ever needed to provide unmatched insights into each individual fault code. Don’t get confused, this simple yet innovative application exploiting the power of AI along with comprehensive OBDii SAE/ISO databases is complementing your daily scanning tools below: obd2 scanner, torque obd2, bluedriver obd2 scan tool, car scanner, car scanner elm obd2, carista, obd fusion, forscan, obdlink, obd11, obdeleven, bimmerlink, veepeak, dash command, elm obd2, carly obd2 car scanner, JScan, repair solutions 2, torque pro, bootmod3, FIXD OBD2 Scanner, autocodes, DtcFix, DTCs Fix, obd jscan, OBDocker, torque lite, ScanMaster, car scanner, Dr. Prius, Carly, HobDrive etc. If you use any of those tools already, keep on using them along with OBDQuest to get more insights of the fault code and ease your car diagnostics. Key Features: 1. Interpretation of over 85,000 OBD2 codes 2. Multilingual support in English, French, Italian, German, Portuguese, and Spanish 3. Extensive coverage across various auto makes and brands 4. Detailed insights for each code search, covering potential symptoms, likely causes, primary components affected, recommended fixes, estimated repair costs, and risk assessment. 5. Unlimited code searches, empowering you to tackle any issue with confidence. OBDQuest isn't just another OBD2 app; it's your trusted companion for navigating the complexities of car diagnostics. Don't let trouble codes hold you back; harness the power of OBDQuest and drive with confidence. EULA - End User License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy : https://obdquest.com/privacy-policy/
GuardKit
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.
- Motion-based activity indicators
- Optional audio activity level detection
- Chronological event timelines
- Local-first data storage
- User control over permissions
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GuardKit is designed to help you understand when your device may have been moved or interacted with while you were away. GuardKit works by running user-initiated Guard Sessions that analyze motion signals such as acceleration, orientation changes, and handling-like movement patterns. If you choose to enable it, GuardKit can also monitor nearby audio activity levels to provide additional context. All analysis is performed on-device. Key features: • Motion-based activity indicators during active Guard Sessions • Optional audio activity level detection (no audio recording) • Clear, chronological timelines of detected events • Local-first data storage — your data stays on your device • Full user control over permissions and features Premium access: GuardKit offers a free 3-day trial with full access to premium features. After the trial, premium access is available via a one-time purchase (Lifetime Unlock). No subscriptions are required. Learn more at https://www.guardkitapp.com
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | OBD Quest | GuardKit |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (3 ratings) |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 54 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Shop Booster Ltd | BLUR TEC LLC |
Customer experience
OBD Quest
GuardKit
In-app purchases
OBD Quest
- Monthly Pro Plan$9.991 Month
- Yearly Pro Plan$99.991 Year
- Pro Plan for 3 days only$0.99
GuardKit
- Lifetime Unlock$4.99









