Fault Code Library vs WireMaster
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Fault Code Library
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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 βhiddenβ 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.
WireMaster
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Unlock a comprehensive set of electrical diagrams and documentation for all BMW E-Series models with BMW WireMaster. This app provides everything you need for detailed understanding and maintenance of your vehicle, including: Electrical Diagrams: Access complete wiring diagrams for BMW E-Series models. Easily find and view wiring schematics, block diagrams, and more. Manuals: All the technical manuals you need for repair and maintenance. Find crucial information about each component and system. Documentation: Access important documents such as service bulletins and technical reports that can assist in repairs and maintenance. Catalogs: Browse parts and accessories catalogs to quickly and conveniently find the right parts for your vehicle. Intuitive Interface: A user-friendly and easy-to-navigate interface that allows you to find the information you need with minimal effort. Offline Access: Save essential information to your device for offline access, ensuring you have what you need even when you're not connected to the internet. BMW WireMaster is an indispensable tool for all BMW E-Series owners and service professionals, providing a complete resource for all your vehicle's electrical and technical needs, right at your fingertips.
Screenshots
Verdict
The clearest difference is update cadence: WireMaster at every 4 months against Fault Code Library's every 17 months. Fault Code Library's advantage is price ($1.99 vs $4.99) and device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Fault Code Library costs $1.99 and WireMaster $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Fault Code Library ships an update every 17 months, WireMaster every 4 months. The most recent releases landed on September 21, 2026 and September 8, 2026 respectively.
| Parameter | Fault Code Library | WireMaster |
|---|---|---|
| Price | $1.99 β better | $4.99 |
| Update frequency | Every 17 months | Every 4 months β better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod β better | iPhone |
| Requires iOS | 15.0 β better | 16.0 |
| Further details β not scored | ||
| Size | 68 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | HITS-UK | Yevhenii Kyriienko |
In-app purchases
Fault Code Library
No in-app purchases
WireMaster
No in-app purchases





