# EE ToolKit PRO — Electronics Engineering > A universal electronics engineering toolkit with over 160 applications and reference tools. (iPhone/iPad app by Thomas Gruber.) - Source: https://appshunter.io/ios/app/ee-toolkit-pro/id368780426 (this page in markdown: same URL + `.md`) - Developer: [Thomas Gruber](https://appshunter.io/developer/342699861) - Category: Productivity, Education - Price: $12.99 - Rating: 4.90/5 from 293 App Store ratings · 164 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 289 MB - Languages: American English, German (Germany) - Released: 2010-04-27 - Data updated: 2026-08-26 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/ee-toolkit-pro/id368780426/reviews.md ## What is EE ToolKit PRO? This is the brand-new Electronics Engineering ToolKit PRO! The HIGHLY RATED and RECOMMENDED productivity app. Users say it is the BEST and MOST PRACTICAL Electronics App in the whole iTunes App Store. From an electronics enthusiast with a master's degree in Electronics Engineering. This App is for engineers, students and hobbyists and anyone interested in Electronics Engineering. The App gets CONSTANT and POWERFUL improvements! !!! This is a UNIVERSAL App - for iPhone and iPad !!! 100% PRO from the beginning without any In-App purchase! The EE ToolKit PRO is the preferred Electronics App at schools and universities. It is available through the Volume Purchase Program with a discount for educational institutions. Many students, teachers and professors have downloaded the App and are using it during their studies and career. WHAT OTHER USERS ARE SAYING: “Awesome app, constant and powerful improvements” This app was worth every penny I paid for it back when I bought it years ago. Since then, I’ve regularly used it at work and found it to be an excellent, quick tool to use. The most impressive aspect of this app are the constant and VERY impressive updates! Massive feature additions and very easy to use interface! The list of capabilities this app has makes it an amazing value for truly anyone involved in electronics. “Latest version makes this an exceptional tool” The EE Toolkit was always a very useful tool, but with the additions in the latest version it is truly an exceptional tool. The author is extremely diligent in managing bugs and improving the tool. “A superb app highly recommended” Fantastic application. Very useful. Always updated. Good developer. Lots of great bonus tools. Just love it. "Incredible useful, worth the money" I have had this app for a while now. Originally as an Electrical Engineering student I didnt really use it but once I was out in the field it became my bible. I definitely recommend to any engineering students/professionals alike. I also recommend buying the Pro version because it is definitely worth it. FEATURES OF THE EE TOOLKIT: Ω more than 160 electronic applications Ω amazingly great multi-functional keyboard Ω huge selection of color code tools and SMD code tools Ω audio scope and a frequency pitch detector Ω favorites page only for the tools that you have marked as favorite Ω full-featured frequency generator Ω extra large component reference section (incl. 7400 Series, PIC family, etc.) with the option to open pdf datasheets live or by e.g. iBooks Ω 555 Timer Tools with the most important application examples Ω extensive collection of Single Board Computers (more than 120 different boards!!!) Ω PCB trace impedance tools for several different structures Ω simple and quick unit conversion within the single calculators Ω fast on-the-fly conversions and calculations Ω real-time circuit simulations of the example circuits Ω support for preferred E series, sliders and min/max calculations Ω auto-save of all entries over several sessions Ω file manager to save and load individual calculations Ω built-in access to your iCloud Ω formula search tool with quick links to the tool which uses the formula Ω and many many more ## Key features - Over 160 electronic applications - Multi-functional keyboard - Color code and SMD code tools - Audio scope and frequency generator - Component reference section with datasheets - 555 Timer tools - PCB trace impedance calculators - Real-time circuit simulations ## What do users think of EE ToolKit PRO? Overall sentiment: positive **Pros** - 🚀 Top-notch tool - 👍 Extremely helpful - 🔥 Invaluable for electronics work - 💯 Excellent app - 🔍 Comprehensive reference - 🧠 Indispensable for engineers - 🤖 Fantastic for hobbyists and professionals - 🎉 Continuously updated and improved **Cons** - 🐛 Occasional crashes or bugs - 🔍 UI could be more intuitive - 📱 Some features not optimized for mobile - 🔢 Limited functionality for advanced users **Commonly reported bugs** - 7400 routine causes app to close - Resistor value calculation issues - Compatibility problems with newer iOS versions **Most requested features** - Add support for vacuum tubes - Implement logarithmic frequency sweep - Include more component pinout information - Integrate a circuit builder/simulator - Add DB to RMS and peak-to-peak conversion ## Recent user reviews (10 of 164) All indexed reviews: https://appshunter.io/ios/app/ee-toolkit-pro/id368780426/reviews.md ### 1/5 — 垃圾 *2026-04-01* 垃圾 ### 5/5 — Top *2025-11-12, version 15.0.0* Best investment ### 5/5 — This app i am using for last 5 years, like it completely help to my work 👍 *2025-07-26, version 14.0.0* This EE pro gives me help really….😊 ### 5/5 — Phénoménal *2025-05-27, version 14.0.0* Merci beaucoup! ### 5/5 — Sehr gut *2025-04-21, version 14.0.0* Spitzen E-Tool, dass es derzeit gibt! Danke! ### 5/5 — Great App *2025-04-21, version 14.0.0* A must have for electronics ### 5/5 — Top app *2025-04-19, version 14.0.0* Of all the apps on my iPhone (and I have way too many), this is the only one that I am truly happy that I found and installed! It brings a smile to my face having all this information in one place and so convenient. It is obvious that the developer fully understands the use cases and probably uses it himself regularly. Sure, it has a couple shortcomings and a couple missing things, but it is great nonetheless. And the new zoom changes make it even better. Another thing that might be a nice add: hot links for newbies. It seems I always have to have a handful of bookmarks open in my browser to remind me the background behind how/why some concepts work. Also landscape mode would be nice in some cases - especially when zooming. ### 3/5 — Pitch Detector *2025-03-12* Just not working :/ Rubbish! Sort it out! **Developer response:** Hello! Many thanks your message. I just re-tested the Pitch Detector on the latest version of the EE ToolKit and on several iPhones and iPads. It works just fine. Could you please double check if you gave the App permissions to access the microphone? Could you double check if the Audio Scope works? If you gave the App microphone permissions and the Pitch Detector still does not work, please try to delete the App and re-install it. Also, please write directly to tom@ee-toolkit.com. That's easier to follow up. Thanks very much, -tom ### 5/5 — Absolutely AMAZING app *2025-02-26* This app alone is well worth the cost of the bundle. This is great for students to engineers. This is invaluable for frequency work. ### 1/5 — Gone downhill *2025-02-08, version 13.6.0* This app has many errors. I tried to reach out and have yet to recieve a reply. I would not recomend this app. States a 100 mhz antenna is 9 feet. ## Frequently asked questions about EE ToolKit PRO ### What does the EE ToolKit PRO app do? The EE ToolKit PRO is a universal app designed for electronics engineering. It provides users with over 160 electronic applications, including calculators, reference sections, circuit simulations, and diagnostic tools. It's built to be a practical and comprehensive resource for professionals, students, and enthusiasts in the field. ### What are the key features of EE ToolKit PRO? Key features include a vast selection of over 160 electronic applications, a multi-functional keyboard, extensive color code and SMD code tools, an audio scope, a frequency generator, a large component reference section with datasheet access, 555 Timer tools, PCB trace impedance calculators, and real-time circuit simulations. ### How much does EE ToolKit PRO cost? EE ToolKit PRO is a paid application and is 100% PRO from the beginning, meaning there are no in-app purchases required to access its full functionality. It is a one-time purchase for the complete toolkit. ### Is EE ToolKit PRO compatible with my device? Yes, EE ToolKit PRO is a universal app, meaning it is designed to work on both iPhone and iPad devices. It is also available through the Volume Purchase Program for educational institutions. ### Who would benefit from using EE ToolKit PRO? This app is ideal for electronics engineers, university students studying electronics, and hobbyists who work with electronic components and circuits. Its comprehensive features and practical tools make it valuable for both educational purposes and professional fieldwork. ## Version history (last 5 releases) ### 15.1.0 — 2026-03-07 Ω Smaller fixes and optimisations ### 15.0.0 — 2025-11-11 Ω Fresh look, improved user interface! • This last update brings a complete view navigation redesign with modernized view handling, fully optimized for iOS 26. Ω Audio Function Generator • new Balance control! Easily adjust the left/right stereo output for precise sound shaping. • Several improvements to musical notes playback Ω smaller fixes and improvements ### 14.1.0 — 2025-09-20 Ω updates for iOS 26 Ω Audio Function Generator • new Balance control! Easily adjust the left/right stereo output for precise sound shaping. • Several improvements to musical notes playback Ω smaller fixes and improvements ### 14.0.0 — 2025-04-19 Ω New Zoom Feature • added zooming support globally for all schematics, images, and formulas. • Now you can easily enlarge and examine details more closely. • Enjoy improved visibility and a more flexible experience. Ω New interactive graphs with cursor: • Low-pass, high-pass filter (Cut-Off frequency tool) • Charging and discharging of a capacitor Ω New Tools (Capacitor Charge Tools) • Inrush Current Limiter using NTC including interactive graph and cursor • Capacitor Quiescent Current calculator including interactive graph and cursor Ω New custom database for datasheets • easily manage your project datasheets with the new custom database feature! • access and store important project information directly from the new menu entry of the sidebar • keep everything organized and readily available whenever you need it Got questions or suggestions? Reach out to us at tom@ee-toolkit.com. If you're enjoying the app, please take a moment to leave a review — it makes a big difference! ### 13.7.0 — 2025-02-27 Ω IC Logic Guide (Logic Gates Tool): overview of the most common process technologies / device families Ω Additions to the SBC Tools section Ω User Interface optimisations and improvements Ω Smaller fixes and improvements all over the App ## Apps similar to EE ToolKit PRO | App | Rating | Price | Category | | --- | --- | --- | --- | | [Electronics Engineer Helper](https://appshunter.io/ios/app/electronics-engineer-helper/id896429646) | 4.8 (432) | Free | Productivity | | [Study Guide Pro](https://appshunter.io/ios/app/study-guide-pro/id916066498) | 4.0 (2) | $2.99 | Productivity | | [Pialytic Julia Editor](https://appshunter.io/ios/app/pialytic-julia-editor/id6741685816) | 4.9 (7) | Free | Productivity | | [Engineering FMEA](https://appshunter.io/ios/app/engineering-fmea/id1036718443) | — | $4.99 | Productivity | | [Rlytic R Programming Editor](https://appshunter.io/ios/app/rlytic-r-programming-editor/id6739818770) | 5.0 (7) | Free | Productivity | | [iCircuit](https://appshunter.io/ios/app/icircuit/id383359044) | 3.8 (134) | $12.99 | Productivity | ## More apps by Thomas Gruber - [EE ToolKit](https://appshunter.io/ios/app/ee-toolkit/id391792609) - [EE ToolKit PRO for iPad](https://appshunter.io/ios/app/ee-toolkit-pro-for-ipad/id393145367) - [Audio Function Generator](https://appshunter.io/ios/app/audio-function-generator/id768229610) - [Audio Function Generator PRO](https://appshunter.io/ios/app/audio-function-generator-pro/id895074703) - [Resistor ToolKit, Color Codes](https://appshunter.io/ios/app/resistor-toolkit-color-codes/id1058581945) All apps by Thomas Gruber: https://appshunter.io/developer/342699861 ## Related topics [electronics reference toolkit](https://appshunter.io/ios/topics/electronics-reference-toolkit) · [electrical engineering toolkit](https://appshunter.io/ios/topics/electrical-engineering-toolkit) · [electronic toolbox pro](https://appshunter.io/ios/topics/electronic-toolbox-pro) --- *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 2026-08-26.*