# Electronic-Toolbox 2 — Engineers, Students, Hobbyists > Comprehensive electronics reference and toolbox for professionals, students, and hobbyists. (iPhone/iPad app by Marcus Roskosch.) - Source: https://appshunter.io/ios/app/electronic-toolbox-2/id6752488879 (this page in markdown: same URL + `.md`) - Developer: [Marcus Roskosch](https://appshunter.io/developer/334053438) - Category: Productivity, Education - Price: $9.99 (on sale, was $14.99) - Rating: 2.30/5 from 3 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 18.5 · 166 MB - Languages: German (Germany), European Spanish, American English, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan), French (France) - Released: 2025-11-18 - Data updated: 2026-08-20 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/electronic-toolbox-2/id6752488879/reviews.md ## What is Electronic? Electronic Toolbox 2 – The classic, re‑imagined Since 2009, Electronic Toolbox has been one of the most comprehensive electronics references and toolboxes on the App Store—for professionals, students, makers, HAMs, and hobby engineers. With Electronic Toolbox 2, a fully modernized new edition arrives: familiar in structure, up to date technologically, and consistently evolved. # The best and most complete electronics app—now for iPhone, iPad & Mac Over 70 tools, tables, and references—from “A” like ASCII table to “Z” like Zener diode calculation: Everything you need in the lab, workshop, or lecture hall, in one place. • Universal app: One purchase—three platforms (iPhone, iPad, Mac) • iCloud sync: All settings and favorites automatically on all devices • Multi‑window support: Use multiple tools in parallel—ideal for comparisons • PDF export: Save, document, or share results • Pinned tools: Keep important tools always at hand • Interactive tools: New visualizations, e.g., in the Battery Charge tool • Modern UI with Dark Mode: Redesigned, clearly structured, and easy to read # Proven foundation, familiar workflow Electronic Toolbox 2 stays true to its heritage—all known tools are included and have been carefully revised. From calculators to reference data: nothing is missing, much is better. Examples: • Resistor color code and coil calculator • NE555 and heatsink calculation • Conversion and unit tools (HEX, AWG, frequency, and more) • Parametric component search with datasheets • Tables for batteries, drill sizes, IC pinouts, packages, and more • References for boards like Raspberry Pi, Arduino, BeagleBone, Nano Pi … • Global search across all tools • Fully usable offline • No ads, no in‑app purchases # Continuously improved—since 2009 Electronic Toolbox has been maintained and improved with passion for over a decade. With version 2, we carry this legacy forward—on a new technical foundation for the years ahead. Feedback from the community remains central: every suggestion helps make the toolbox even better. # Gentle transition The original Electronic‑Toolbox Pro remains fully usable—existing workflows are not interrupted. Existing customers can switch to the new version via a discounted bundle. Features like the Circuit Editor or Projects will initially remain exclusive to Electronic‑Toolbox Pro and are not yet included in this new edition. # From the developer Jan Roskosch built Electronic Toolbox 2 together with his father Marcus Roskosch, the developer of the original app. A modern realization of a classic—with the same passion for electronics, precision, and quality. # At a glance • Completely new, modern interface • All known tools from the original app included • Universal app for iPhone, iPad, and Mac • iCloud synchronization • PDF export & multi‑window support • Fully usable offline • No ads, no in‑app purchases ----- Electronic Toolbox 2—the future of the electronic toolbox. Continued with passion. Built for you. ## Key features - Over 70 tools, tables, and references - Universal app for iPhone, iPad, and Mac - iCloud sync across devices - Multi-window support for parallel use - PDF export for results - Offline functionality - Modern UI with Dark Mode ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/electronic-toolbox-2/id6752488879/reviews.md ### 5/5 — Geniale App ! *2026-01-31* Ein Schallpegel Messwerkzeug wäre eine nützliche Ergänzung. ### 5/5 — Top App für E/Techniker *2025-11-22* Wunderbares Redesign des unschlagbaren Klassikers unter den E-Technik Toolboxen ## Frequently asked questions about Electronic ### What is Electronic-Toolbox 2? Electronic-Toolbox 2 is a comprehensive electronics reference and tool suite designed for professionals, students, and hobbyists. It offers over 70 tools, tables, and data, including calculators, unit conversions, and component references. ### What devices does Electronic-Toolbox 2 support? Electronic-Toolbox 2 is a universal app and can be used on iPhone, iPad, and Mac devices. A single purchase grants access to all three platforms. ### Can I use Electronic-Toolbox 2 offline? Yes, Electronic-Toolbox 2 is fully usable offline. All tools, tables, and references are available without an internet connection, making it ideal for use in the lab, workshop, or lecture hall. ### Does Electronic-Toolbox 2 have ads? No, Electronic-Toolbox 2 does not contain advertisements. The app is ad-free, ensuring an uninterrupted user experience. ### How often is Electronic-Toolbox 2 updated? Electronic-Toolbox 2 was last updated on April 4, 2026, with version 1.3.1. The app has been continuously improved since 2009, with a commitment to ongoing development based on community feedback. ### What are the key features of Electronic-Toolbox 2? Key features include over 70 tools and references, iCloud sync, multi-window support for parallel use, PDF export, a modern UI with Dark Mode, and offline functionality. It also offers a global search across all tools. ### What is the price of Electronic-Toolbox 2? Electronic-Toolbox 2 is a paid application priced at $9.99. This one-time purchase provides access to all features and platforms without ads or in-app purchases. ### What is the age rating for Electronic-Toolbox 2? Electronic-Toolbox 2 has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content. ## Version history (last 5 releases) ### 1.3.1 — 2026-04-04 • Air coil calculation fixes - Fixed wire diameter scaling, DC resistance formula, and inductance unit conversion for accurate results. • MC34063A tool improved - The DC-DC converter now shows detailed error messages with operating limits and validates peak current before discarding results. • Karnaugh Map expression fix - Simplified expressions are no longer clipped and can be copied as plain text. • Number converter fix - Decimal inputs now correctly produce float values with positive exponents. • Color tool: RGB & HSL percentages - Added RGB and HSL percentage display formats for iCircuit compatibility. Fixed incorrect percent sign on H in the HSL system. Thanks for your great support and feedback which helps to further improve this App. Please use the CONTACT DEVELOPER feature inside the App to report any issue so it can be fixed real quick. Jan ### 1.3.0 — 2026-04-01 • Full Spanish localization - Electronic Toolbox is now fully available in Spanish. All tools, descriptions, and interface elements have been translated for Spanish-speaking users. • Seeeduino Xiao boards added - The Arduino Resource Tool now includes the Seeeduino Xiao board family with full pinout details and specifications. • Toroid calculation fixes - Fixed incorrect results in the Toroid coil calculations, ensuring accurate inductance and winding values. Thanks for your great support and feedback which helps to further improve this App. Please use the CONTACT DEVELOPER feature inside the App to report any issue so it can be fixed real quick. Jan ### 1.2.0 — 2026-03-05 • New DC‑DC Converter & enhanced calculation tools — Added a DC‑DC Converter tool for the MC34063A. Updated calculators: LM2576 added to the Voltage Regulator, time‑constant calculation added to Filter, and loopstick (ferrite rod) coil support. • Smarter parameter gestures & improved navigation — Improved input/result parameter handling across calculators: swipe right to toggle a parameter's role (input/result) and swipe left to lock or unlock a parameter as input. • Diodes tool — Added visual symbols for different diode families to make identification and selection faster in the component browser. • Resource tools & glossary — Resource tools with glossary content now expose their sections directly in the glossary list for faster navigation and discovery. • Flexible export (HTML & TXT) with custom fields — Export calculation results as HTML or plain TXT. New export controls let you include or exclude specific data fields so exported reports contain exactly what you need. Thanks for your great support and feedback which helps to further improve this App. Please use the CONTACT DEVELOPER feature inside the App to report any issue so it can be fixed real quick. Jan ### 1.1.0 — 2026-01-27 • New Bourns 3296 Tool - Comprehensive database featuring 342 multiturn trimmer potentiometers with detailed electrical specifications, temperature ratings, and advanced filtering capabilities • Completed Tube Database - Added missing specifications and completed data coverage for vacuum tube components, ensuring comprehensive information for all available tube types • Fixed TLS Connection Errors - Resolved certificate validation issues that prevented datasheets and external links from opening properly, ensuring reliable access to documentation across the app Thanks for your great support and feedback which helps to further improve this App. Please use the CONTACT DEVELOPER feature inside the App to report any issue so it can be fixed real quick. Jan ### 1.0.3 — 2025-12-14 Fixed an issue where pink noise and white noise couldn't be generated inside the Tone Generator Tool ## Apps similar to Electronic | App | Rating | Price | Category | | --- | --- | --- | --- | | [EngineerCalc](https://appshunter.io/ios/app/engineercalc/id1454820389) | — | $1.99 | Productivity | | [Filters](https://appshunter.io/ios/app/filters/id369326771) | 3.0 (1) | $0.99 | Productivity | | [Just a Simple Video Converter](https://appshunter.io/ios/app/just-a-simple-video-converter/id6479526173) | 5.0 (1) | $4.99 | Productivity | | [OhmniView](https://appshunter.io/ios/app/ohmniview/id6746820208) | — | Free | Productivity | | [DogTrainer-Pro](https://appshunter.io/ios/app/dogtrainer-pro/id6757438809) | — | Free | Productivity | | [Engineering FMEA](https://appshunter.io/ios/app/engineering-fmea/id1036718443) | — | $4.99 | Productivity | ## More apps by Marcus Roskosch - [iCluster - DX-Cluster database](https://appshunter.io/ios/app/icluster-dx-cluster-database/id334053435) - [Electronic Toolbox Pro](https://appshunter.io/ios/app/electronic-toolbox-pro/id339158729) - [RF-Toolbox Pro](https://appshunter.io/ios/app/rf-toolbox-pro/id593044099) - [SmartSDR™ - FlexRadio Systems®](https://appshunter.io/ios/app/smartsdr-flexradio-systems/id1089157289) - [SamacSys](https://appshunter.io/ios/app/samacsys/id1454509750) - [SDR-Control for Icom](https://appshunter.io/ios/app/sdr-control-for-icom/id1614141094) All apps by Marcus Roskosch: https://appshunter.io/developer/334053438 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-20.*