Technical Pocket Guide (STT) vs OBD2 Codes | Repair Guide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Technical Pocket Guide (STT)
This mobile reference guide offers essential technical knowledge for students, engineers, and technicians. It features a comprehensive search function, customizable bookmarks, and offline access, making it a convenient tool for daily work.
- Mobile technical reference
- Full-text search
- Table of contents with links
- Customizable bookmarks and notes
- Email content sharing
- Offline functionality
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Schaeffler’s Technical Pocket Guide in a new edition! Schaeffler's Technical Pocket Guide provides students of technical degree programs, engineers, and technicians alike a compact and mobile reference work to help them in their day-to-day work. Several chapters have been updated in the new edition and the chapters about tolerances and design elements have been expanded. An overview of the individual features is given below: - You can read the STT on your mobile device - Full-text search function - Table of contents with links to the chapters - Individual bookmarks and notes can be saved - Content can be sent quickly and easily by e-mail - Full offline functionality and contact with Schaeffler Get hold of this technical knowledge as a reference work on your mobile device now!
OBD2 Codes | Repair Guide
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OBD2 Codes | Repair Guide is a fast automotive reference for OBD2 and OBD-II diagnostic trouble codes (DTCs), check engine codes, and common vehicle fault codes. Search by exact code or keyword to quickly understand what a trouble code means, review possible causes and symptoms, and explore suggested diagnostic checks and repair guidance. Key features • Search OBD2 / OBD-II and DTC fault codes • Look up generic and manufacturer-specific codes • Browse P, B, C, and U code families • Explore codes by category and manufacturer • Review definitions, reference context, possible causes, and repair guidance • Save important codes to Favorites • Organize saved codes into collections • Review recently viewed codes in History • Use the local code database offline • English and Arabic interface support • Light and dark themes with reading preferences • Share useful code information • Optional lifetime Remove Ads purchase Useful for automotive fault-code lookup Use the app as a quick reference for check engine light codes, engine and transmission faults, sensor issues, emissions-related codes, electrical systems, body systems, chassis systems, and vehicle network communication codes. If a scan tool or technician gives you a code such as P0420, P0300, or P0171, OBD2 Codes | Repair Guide helps you understand the code and identify useful areas to inspect next. Works offline The diagnostic code database is stored locally on your device, so code lookup remains available without an internet connection. No account or login is required for normal use. Important OBD2 Codes | Repair Guide is an informational diagnostic code reference. It does not connect to your vehicle, read live vehicle data, clear fault codes, or replace an OBD2 scanner or professional diagnostic equipment. Code definitions, possible causes, symptoms, and suggested checks are reference information and may vary by vehicle make, model, year, and system. Always verify faults using appropriate diagnostic equipment and consult a qualified technician when needed.
Screenshots
Verdict
The clearest difference is in-app purchases: Technical Pocket Guide (STT) at none against OBD2 Codes | Repair Guide's 1. Technical Pocket Guide (STT) also leads on ads (none vs shown). OBD2 Codes | Repair Guide's advantage is update cadence (fortnightly vs every 9 months) and iOS requirement (15.0 vs 17.0). 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
Both are free to download. OBD2 Codes | Repair Guide sells 1 one-off in-app purchase. Technical Pocket Guide (STT) asks for nothing beyond the download.
Technical Pocket Guide (STT) ships an update every 9 months, OBD2 Codes | Repair Guide fortnightly. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.
| Parameter | Technical Pocket Guide (STT) | OBD2 Codes | Repair Guide |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 55.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 9 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 55 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | Schaeffler | sultan hamdi |
In-app purchases
Technical Pocket Guide (STT)
No in-app purchases
OBD2 Codes | Repair Guide
- Remove Ads$6.99






