Comparison

Fault Code Library vs Auto

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

Head to head
About

Fault Code Library

Features
Read full description

Fault Code Library is, quite simply, a library containing nearly every fault code for nearly every BMW made, worldwide, since on board diagnostics were installed. Most recent BMW vehicles can show you the errors stored in memory without the need for any other equipment. This is usually found through a ‘hidden’ service menu and usually can be accessed using one of the buttons on the dash. BMW error codes are given in hexadecimal (hex) format (looking like 0x1234ABCD). Because there are so many fault codes from so many different electronic control units (ECUs), many cheap OBD readers cannot give you the whole story. Even professional OBDII readers may not have all the fault codes generated as OBDII does not cover all manufacturer-specific faults. Fault Code Library has been designed to tell you what a fault code means and which ECU is generating it. It uses the native hexadecimal format so that you get the full fault details. The library contains over 19,000 fault codes and their meanings. It does not use an Internet connection, so it is always with you, wherever you are even when you have no Internet access. Fault Code Library has been written for BMW enthusiasts worldwide as well as independent garages/specialists. Fault Code Library is also useful for research. The app covers DME/DDE codes for nearly all petrol and diesel BMWs, however, at this time hybrid and pure electric models are not in this release. Another feature is the ECU location function. Once you have entered a valid hex code into the search bar, the app will tell you which ECU is generating the fault and will show you approximately where the ECU may be located. This is possibly one of the most comprehensive libraries available, and is continually being updated and improved. NOTE: This does not connect to the vehicle. This is a full library of codes that interpret On-Board Diagnostics found in the vehicle history.

About

Auto

Access comprehensive technical data for over 300 car brands, including models, generations, and modifications. The database is updated daily and features images for most entries. Available in 14 languages, it's perfect for car enthusiasts.

Highlights
  • Extensive car brand database
  • Detailed model and modification data
  • Daily database updates
  • Images for generations and modifications
  • Multi-language support (14 languages)
Features
Read full description

Auto-Data.net app is an iOS app for car technical specifications. It contains technical data of more than 300 of the most popular brands on the World. Every brand has models, generations, modifications and list of technical data. The database is daily updated. Almost all generations and modifications are represented with images. The app is offered in 14 languages: - Bulgarian - English - Russian - German - Italian - French - Spanish - Greek - Turkish - Romanian - Finnish - Swedish - Norwegian - Polish It's a ideal app for each car enthusiast.

Screenshots

Fault Code Library2 screens
Auto4 screens

Verdict

The call

The clearest difference is price: Auto at Free against Fault Code Library's $1.99. Auto also leads on update cadence (every 4 months vs every 17 months) and iOS requirement (13.0 vs 15.0). Fault Code Library's advantage is ads (none vs shown). On in-app purchases 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

Auto is free to download; Fault Code Library costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Fault Code Library ships an update every 17 months, Auto every 4 months. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.

Scorecard4 real differences · 6 level
Fault Code Library versus Auto: the parameters behind the verdict, then further details
ParameterFault Code LibraryAuto
Price$1.99Free — better
Rating—1.5 (2 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 17 monthsEvery 4 months — better
AdsNo — betterYes
In-app purchasesNoNo
Monetization—Ad-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size68 MB7 MB
Age rating4+4+
DeveloperHITS-UKAutomotive Data Ltd

In-app purchases

None

Fault Code Library

No in-app purchases

None

Auto

No in-app purchases

Questions

Is Fault Code Library free?
Fault Code Library costs $1.99, with no in-app purchases.
Is Auto free?
Auto is free to download, with no in-app purchases.
Do Fault Code Library or Auto have ads?
Auto shows ads; Fault Code Library does not.
Which is updated more often, Fault Code Library or Auto?
Fault Code Library ships an update every 17 months, and Auto every 4 months. Most recently, Fault Code Library was updated on September 21, 2026 and Auto on September 22, 2026.

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