Comparison

EE ToolKit PRO vs Key Retrieve

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

EE ToolKit PRO

This comprehensive toolkit offers over 160 electronic applications, calculators, and reference sections for electronics engineers, students, and hobbyists. It includes features like a multi-functional keyboard, color code tools, audio scope, and circuit simulations, with ongoing improvements and updates.

Highlights
  • 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
Features
Read full description

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

About

Key Retrieve

Features
Read full description

***Important: Key Retrieve requires a login each and every time before using. The login will generate a random lock code in which the correct bitting will need to be provided. If you are not in the locksmith industry you will be unable to use this app.*** Have a customer who lost the combination to their push button lock box? Then this tool will help you retrieve your customer's keys and allow the ability to reuse their lock box. This tool was made specifically for the style lock boxes that have mechanical push buttons numbered one through five along the left side, 6 through zero along the right side, a vertical slider in the top-middle to open, and a vertical slider in the bottom-middle to clear all the buttons that may have been pressed. These lock boxes allow any combination of the ten numbers to be set from simply no combination at all to using all ten numbers, barring that no number can be repeated and the order in which the numbers are pressed do not matter. There are two different methods in which Key Retrieve uses: lock boxes that cannot be manipulated and lock boxes that can. This tool will not help manipulate nor will it show which method to use, but instead facilitates the process by eliminating wasted attempts and removes possibilities that would never exist. Overview: Key Retrieve consists of two different methods for opening which are simply named System 1 and System 2. You can toggle between the systems using the switch in the upper right hand corner. Both systems are executed using the controls at the bottom: Eject resets everything to default. Left Arrow moves back a step. Play begins the sequence automatically. Pause stops the sequence. And Right Arrow moves forward a step. (moving back a step is infinite for System 1 but limited to one step for System 2). Right above the controls is a progress bar that displays the amount of combinations tried out of the combinations available, as well at the very top is a slider to control the speed when using the automatic sequence (play control). Lastly, in the middle displays the combination to be tried in text as well as a graphic representation of the lock where the corresponding numbers/buttons will highlight to help as a visual aid. System 1: This system is only used on locks that cannot be manipulated and/or when no prior knowledge exists. Use System 2 if any part of the combination is known. Because these locks do not care about order and numbers cannot be repeated, there are only 1,024 possibilities (including no combination). This system will exhaust all 1,024 if needed, which with no strategy amounts to pressing over 7,000 buttons. However, only about a third of this 7,000+ total will be required for this system's method.

 To start, press Play or use the Next control repeatedly. The app will tell you one by one which button to press that you will simply copy onto the lock. You can set your speed by using the slider at the top if utilizing the Play control to run automatically. Tip: Before starting set the speed at various settings to calibrate your comfort. System 2: This system is only used when you have at least one known number in the combination, which is typically achieved from manipulation. Every number that is known in advance cuts the total possibilities in half. To start, tap on each number that is known and one at a time the number will be highlighted with a blue halo (tap again to turn off). After all known numbers have been selected, begin by using the Play or Next controls similar to System 1, except instead of a single button being displayed, the entire combination followed by Open and Clear will result as a single cycle. Remember that order does not matter: if the combination displayed contains a 1, 5, and an 8, then pressing 8 then 1 then 5 will result the same. Tip: Take your time manipulating the lock before using the app. Spending an extra minute or two up front can save much more later on.

Screenshots

EE ToolKit PRO4 screens
Key Retrieve4 screens

Verdict

The call

The clearest difference is update cadence: EE ToolKit PRO at every 3 months against Key Retrieve's every 12 months. On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

EE ToolKit PRO costs $9.99 and Key Retrieve $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

EE ToolKit PRO ships an update every 3 months, Key Retrieve every 12 months. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

Scorecard1 real difference · 9 level
EE ToolKit PRO versus Key Retrieve: the parameters behind the verdict, then further details
ParameterEE ToolKit PROKey Retrieve
Price$9.99$9.99
Rating4.9 (293 ratings) — better—
Positive reviews89.6% of reviews—
Number of ratings293 — better—
Update frequencyEvery 3 months — betterEvery 12 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.012.0
Further details — not scored
Size289 MB12 MB
Age rating4+4+
DeveloperThomas GruberFarren Domenici

Bugs and requests

EE ToolKit PRO

Reported bugs

3 issues
  • 7400 routine causes app to close
  • Resistor value calculation issues
  • Compatibility problems with newer iOS versions

Requested features

5 requests
  • 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

Key Retrieve

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

EE ToolKit PRO

No in-app purchases

None

Key Retrieve

No in-app purchases

Questions

Is EE ToolKit PRO free?
EE ToolKit PRO costs $9.99, with no in-app purchases.
Is Key Retrieve free?
Key Retrieve costs $9.99, with no in-app purchases.
Do EE ToolKit PRO or Key Retrieve have ads?
Neither EE ToolKit PRO nor Key Retrieve shows ads.
Which is updated more often, EE ToolKit PRO or Key Retrieve?
EE ToolKit PRO ships an update every 3 months, and Key Retrieve every 12 months. Most recently, EE ToolKit PRO was updated on October 13, 2026 and Key Retrieve on October 10, 2026.

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