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.


“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.

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

What’s New

Version 12.3.0

The brand-new EE ToolKit is here! Happy to present great new tools, great improvements and handy new feature additions.

Ω New Tools:
• Comparator tools (inverting, non-inverting). Easy to understand and very useful for experimenting with OpAmp comparator circuits. With comprehensive additional explanations and illustrations. Available via the OpAmp Circuit Tools.
• Schmitt-Trigger tools / Comparator with Hysteresis (inverting, non-inverting). Easy to understand and very useful for experimenting and learning about comparator circuits with hysteresis. Additional text explaining how comparators can be extended to support hysteresis and thus two different threshold levels. Available via the OpAmp Circuit Tools.
• Inrush current calculator for Load Switches (using the TPS2292x from Texas Instruments as an example). This is part of the Capacitor Charge Tools.

Ω Notes: from this version onwards, you can save own drawings plus text notes for each tool individually. An overview of all stored notes and drawings is provided via the side menu on the main page.
Ω Zooming on info pages on iPads is working much smoother now
Ω Frequency Pitch Detector is now fully unlocked also in the free version
Ω Smaller fixes and improvements all over the App

Ratings and Reviews

4.9 out of 5
158 Ratings

158 Ratings

Jamesw2965 ,

Awesome and Informative app

I’m getting back into my electronics. I’m finding this app to be very informative and helpful. One of the things that has impressed me is that the app designer has added information on various electronic products such as the Raspberry Pi and Arduino. What makes this so impressive is that he as added every bit of information about the product you could want. And it he does the same thing for both the electronic components and circuits. This app is bring me back to my school days when I was learning all this. Awesome app.



As a fairly novice ham radio operator and electronics tinkerer, this app has been absolutely indispensable to me. It has been a great learning tool.

If you are wondering if maybe it is too advanced for you, I thought the same. There are still many functions that I don’t understand (yet). But, as I progress with my understanding of electronics more and more of the functions become useful.

The Function generator alone is worth the money. I use it all the time to generate Lissajous patterns on my oscilloscope. Also useful for testing cross overs on speakers.

The resistor color band calculator is excellent as are the series and parallel component calcs.

Looking forward to future updates, and to gaining a better understanding of the other functions.

Jomegastevewxyz ,

Very handy App

I’ve been using the this app for a many years. It has always performed well. I am a professional electronic engineer. There are more features than I need. A great collection of converters, calculations, and general data. The Favorites page is great for organizing the 8 or 10 items I use all the time.

App Privacy

The developer, Thomas Gruber, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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