Comparison

EE ToolKit PRO for iPad vs Grindcalculator

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 for iPad

This comprehensive toolkit offers over 160 electronic applications, calculators, and reference tools for electronics engineers, students, and hobbyists. It features a multi-functional keyboard, color code tools, audio scope, frequency generator, and component reference section with datasheet integration.

Highlights
  • Over 160 electronic applications
  • Multi-functional keyboard
  • Color code and SMD code tools
  • Audio scope and frequency detector
  • Component reference section with datasheets
  • 555 Timer tools
  • PCB trace impedance calculators
Features
Read full description

This is the brand-new Electronics Engineering ToolKit for iPad! 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! !!! Please Note: this is the EE ToolKit PRO for iPad Only !!! If you are interested in the Universal-App for iPhone and iPad, please look for the EE ToolKit App with the red icon. 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

Grindcalculator

This tool simplifies knife sharpening by calculating the correct angle, eliminating the need for manual marking. Save custom sharpening angles and grinding wheel dimensions for consistent results across various brands and types of sharpening tools.

Highlights
  • Precise angle calculation
  • Eliminates manual marking
  • Save custom angles
  • Save grinding wheel dimensions
  • Supports all grinder brands
  • Offline functionality
Read full description

The sharpening calculator is the perfect tool for sharpening knives. Especially when sharpening knives, it is important that the correct angle is resharpened. Most manufacturers, such as Tormek, Einhell, Scheppach, Record Power and many others supply an angle gauge specially designed for the machine. It takes a lot of practice to set the machine correctly with the gauge in order to be able to sharpen the correct sharpening angle on the knife or any other sharpening piece. Professionals often mark their phase to adjust the toolbar to the correct height. We developed the sharpening calculator app to make it easier to sharpen or sharpen knives and, above all, to get a consistently good sharpening result. The annoying phase marking is no longer necessary. Just like the complicated application of the angle gauge to the clamped sanding pad and the adjustment of the toolbar. There is almost no limit to the detection of grinders, grinding wheels and grinding pieces. Grinding pieces are, for example, kitchen knives, wood chisels or planer knives. Everything that can be ground with a wet grinding machine. After the app has been installed, the basic dimensions for the top toolbar, the front bar and, if available, the front base must be entered as described in our tutorial. The values can be adjusted at any time if you have measured yourself. The grinding wheels can either be saved or adjusted again for each grinding process. Here it is important that CBN wheels, for example, always have the same diameter, but wet grinding stones lose diameter through use. This value must be adjusted before grinding. The grinding calculator is suitable for probably every grinding machine from all manufacturers. Even individual structures can be used. Many app users have bought various grinding wheels from, for example, grinding junkies. The grinding calculator also works perfectly for this. With some polishing wheels, an angle correction can be stored so that polishing works even better. If you have recurring sharpening pieces such as kitchen knives, it is possible to save them with the respective sharpening angle. This eliminates the need to measure the angle again when resharpening and everything goes much faster. The grinding calculator is now also available for the iPad. All functions can be used. If you allow access to the iCloud, then all entries are synchronized between the devices. This means that all devices, grinding wheels and grinding pieces are synchronized on all devices used such as iPhone and iPad. This process is also the only thing for which the grinding computer needs an internet connection. Otherwise, the app works anytime, anywhere, even without an active internet connection. With family sharing, each user has their own database. It is currently not possible to share your own devices between users. Further features are described on our website https://www.grindcalculator.de. The procedure is described in detail in the operating instructions, which can be found under the URL https://www.grindcalculator.de/tutorials/operation-manual.

Screenshots

Grindcalculator4 screens

Verdict

The call

The clearest difference is rating: EE ToolKit PRO for iPad at 4.8 against Grindcalculator's 1.0. EE ToolKit PRO for iPad also leads on ratings volume (79 vs 1) and iOS requirement (12.0 vs 26.0). Grindcalculator's advantage is update cadence (every 4 days vs every 3 months) and price ($6.99 vs $7.99). On review sentiment, ads, in-app purchases and monetization model 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 for iPad costs $7.99 and Grindcalculator $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

EE ToolKit PRO for iPad holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: EE ToolKit PRO for iPad has 79 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of EE ToolKit PRO for iPad's written reviews are positive against 85% of Grindcalculator's.

UpkeepUpdate frequency

EE ToolKit PRO for iPad ships an update every 3 months, Grindcalculator every 4 days. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 5 level
EE ToolKit PRO for iPad versus Grindcalculator: the parameters behind the verdict, then further details
ParameterEE ToolKit PRO for iPadGrindcalculator
Price$7.99$6.99 — better
Rating4.8 (79 ratings) — better1.0 (1 ratings)
Positive reviews86.2% of reviews — better84.6% of reviews
Number of ratings79 — better1
Update frequencyEvery 3 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad — better
Requires iOS12.0 — better26.0
Further details — not scored
Size289 MB9 MB
Age rating4+4+
DeveloperThomas GruberRoWo UG

Customer experience

EE ToolKit PRO for iPad

All ratings79 ratings
Positive94.9%
Neutral2.5%
Negative2.5%
Written reviews109 reviews
Positive86.2%
Neutral3.7%
Negative10.1%

Grindcalculator

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews13 reviews
Positive84.6%
Neutral0.0%
Negative15.4%

Bugs and requests

EE ToolKit PRO for iPad

Reported bugs

8 issues
  • BJT icon for 2N3904 exists but component is missing
  • iPad version is exactly the same as iPhone/iPad Pro Universal version
  • No option to go back to menu page after selecting a category
  • Adjusting capacitor affects inductor circuit calculation
  • PD resistors are transposed
Show 3 more
  • Resistors for adjustable regulator calculator are transposed
  • Resistor/inductor impedance calculator does not work
  • Some bugs make certain circuits not function properly

Requested features

14 requests
  • Add BJT 2N3904 and other low noise general purpose parts
  • Add wiring for On On On switch
  • Add USB-C connector pin-outs
  • Improve resistor divider tool to recommend resistor values
  • Add vacuum tube amplifier information
Show 9 more
  • Add Field and waves information
  • Add transformer, inductor, and electromagnetism category
  • Include audio applications of the 555 timer
  • Add more reference circuits (active filters, op-amp, SMPS)
  • Add resistor ladder calculator
  • Add 4000 series ICs
  • Add transformer section with power factor calculations
  • Improve UI design and layout
  • Add dark mode option

Grindcalculator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

EE ToolKit PRO for iPad

No in-app purchases

None

Grindcalculator

No in-app purchases

Questions

Is EE ToolKit PRO for iPad free?
EE ToolKit PRO for iPad costs $7.99, with no in-app purchases.
Is Grindcalculator free?
Grindcalculator costs $6.99, with no in-app purchases.
Which has better reviews, EE ToolKit PRO for iPad or Grindcalculator?
EE ToolKit PRO for iPad is rated higher. EE ToolKit PRO for iPad averages 4.8 out of 5 from 79 ratings, while Grindcalculator averages 1.0 from 1 ratings.
Do EE ToolKit PRO for iPad or Grindcalculator have ads?
Neither EE ToolKit PRO for iPad nor Grindcalculator shows ads.
Which is updated more often, EE ToolKit PRO for iPad or Grindcalculator?
EE ToolKit PRO for iPad ships an update every 3 months, and Grindcalculator every 4 days. Most recently, EE ToolKit PRO for iPad was updated on October 17, 2026 and Grindcalculator on October 7, 2026.

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