EE ToolKit 4+

Electronics Engineering

Thomas Gruber

Designed for iPad

    • 4.7 • 1.2K Ratings
    • Free
    • Offers In-App Purchases



This is the brand-new Electronics Engineering ToolKit! The HIGHLY RATED and RECOMMENDED productivity app.

Users say it is the BEST and MOST PRACTICAL Electronics App in the whole 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 !!! With In-App upgrade to PRO. If you don't like In-App purchases, you can also download the PRO version (red icon with PRO text) which is full PRO from the beginning without any In-App purchase.


“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 13.4.0

Ω Audio Function Generator:
• Redesigned Fine-Tune popover!
• change the tone amplitude and the system volume independently
• change the volume in % or in dB
• custom configuration of the volume step size
• custom configuration of the frequency step size
• Several user interface changes and improvements

Ω New temperature sensor tool (“Nonlinear R” tools)
Ω Audio Scope improvements (FFT label)

If you have any questions or suggestions, please feel free to email us at

Ratings and Reviews

4.7 out of 5
1.2K Ratings

1.2K Ratings

MJCino ,

Almost amazing

This app looks like exactly what I’m looking for. Seems pretty easy to use, has the formulas, etc. I find myself wishing there were more circuits included though. I’m an EE student and working with op amps right now. There’s a bunch of fairly standard circuits included, which may be everything most people would need for working in the field. However, I’m running into circuits not included - such as an Multiple-Feedback Bandpass (MFB) active filter. I appreciate what they have here; I would just recommend looking to see if it has everything you need (or that you’re okay looking up what isn’t here yourself) before buying it.

S-F-R ,

Genuinely Useful

This is a well thought out and genuinely useful piece of software that ends up saving me hours on every project. It is worth the extra money for the pro version, as you will see if you try the free version. The documentation portal aspect alone is a helpful tool (how many times have you had to search for your GPIO wiring diagrams because you forgot which pin is 5V and which is 3.3V) and add on top all the remaining aspects and it’s well worth it.

EbbFlow44 ,

A couple things before I hand over $7.99

This looks like it has potential, but I see a few issues. 1) On an iPhone XS screen, the brown resistor band appears as dark red. I deal with color every day, and my phone display is fine. Perhaps find a more neutral brown color to use. 2) Browsing through the free features, I managed to activate a musical note in the function generator that sent my speaker into a high pitch. I could not stop it. Muting the volume did not work, and I had to press the power button. Hope to see more, as I’m just starting into electronics.

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

    Some in‑app purchases, including subscriptions, may be shareable with your family group when Family Sharing is enabled.

More By This Developer

Audio Function Generator
MultiTone Generator
EE ToolKit PRO
Resistor ToolKit, Color Codes
Audio Function Generator PRO
MultiTone Generator PRO

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