Comparison

OBD Quest vs Hongtool

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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/

About

Hongtool

Features
Read full description

Hongtool is a useful car inspection tool. Including detection functions for fault codes, frozen frames, data streams, oxygen sensors, batteries, etc. Fortunately, fun modules such as dashboard, performance testing, and trip analysis make your car worry free and full of fun.

Screenshots

OBD Quest4 screens
Hongtool4 screens

Verdict

The call

The clearest difference is in-app purchases: Hongtool at none against OBD Quest's 3. Hongtool also leads on ads (none vs shown) and iOS requirement (9.0 vs 14.0.0). OBD Quest's advantage is update cadence (every 3 weeks vs every 11 months). On price and device support 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OBD Quest sells 3 in-app purchases, starting at $9.99 per month. Hongtool asks for nothing beyond the download.

UpkeepUpdate frequency

OBD Quest ships an update every 3 weeks, Hongtool every 11 months. The most recent releases landed on October 2, 2026 and October 18, 2026 respectively.

Scorecard4 real differences · 5 level
OBD Quest versus Hongtool: the parameters behind the verdict, then further details
ParameterOBD QuestHongtool
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 3 weeks — betterEvery 11 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0.09.0 — better
Further details — not scored
Size54 MB154 MB
Age rating4+4+
DeveloperShop Booster Ltd海淑 金

In-app purchases

3 purchases

OBD Quest

Subscriptions2
  • Monthly Pro Plan$9.991 Month
  • Yearly Pro Plan$99.991 Year
One-time1
  • Pro Plan for 3 days only$0.99
None

Hongtool

No in-app purchases

Questions

Is OBD Quest free?
OBD Quest is free to download, with in-app purchases available.
Is Hongtool free?
Hongtool is free to download, with no in-app purchases.
Do OBD Quest or Hongtool have ads?
OBD Quest shows ads; Hongtool does not.
Which is updated more often, OBD Quest or Hongtool?
OBD Quest ships an update every 3 weeks, and Hongtool every 11 months. Most recently, OBD Quest was updated on October 2, 2026 and Hongtool on October 18, 2026.

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