Electronic Toolbox Pro
by Marcus Roskosch
- Productivity
- Paid
- Zombie
- Rating
- 4.8
- 26 ratings · Italy storefront
- Last update
- Sep 13, 2022
- Version 14.5.01
- Size
- 211 MB
- Category
- Productivity
- Tracked since
- Oct 10, 2026
Estimated revenue
A model estimate with a likely range, not a reported figure.
No estimate. Apps outside the grossing charts, and some countries, have no reliable rank-to-revenue curve, so we show nothing rather than a guess.
How this estimate is made
Rank: we take the app's best Top Grossing rank on the latest chart day. Category ranks are converted into an equivalent overall rank, because a #10 in Finance earns far less than a #10 overall.
Curve: that equivalent rank is read off a rank-to-revenue curve anchored on public company revenue and market-data reports for the US iPhone App Store.
Country: the curve is scaled per country (Japan is roughly a third of the US, Türkiye under 1%). Where we have no scale, such as China, there is no estimate.
Range: the likely range widens with country, category and chart depth. It is a plausible span, not a statistical confidence interval.
Not included: ads, payments outside the App Store, and any difference between gross sales and what the developer keeps. Low confidence means indirect data; medium means several independent sources agree.
Full methodScreenshots
As shown on the App Store listing.
About this app
Text from the App Store listing.
The * ORIGINAL * Electronic Toolbox Pro App
"The best and most complete Electronics App on the App Store" for Professionals, Hobbyists, Makers, HAMs and Students right at your fingertips!
Best of all: Continuously improved since 2009 - FOR FREE - NO IN APP PURCHASE - NO FAKE REVIEWS!
What users wrote about this app:
Well worth the money *
I researched all EE apps before buying this one and I have to say that this one is the best by far. The developer is very accommodating to requests and suggestions and provides updates frequently. Very, very happy with this app.
Simply brilliant *
I don't normally review apps but I was so impressed with this one I felt I had to make a brief comment. Buy it, I promise you won't be disappointed.
Supports iOS 14 back to iOS 11 and all available Apple iPhone and iPad models.
See the online Manual at http://go-to.me/etb-manual
Feature Highlights:
■ Circuit Editor
■ Most comprehensive and complete Electronics app available
■ Designed for Novices as well as Experts
■ Numerous individual tools from "A" like ASCII Table to "Z" like Zener Diode calculation. If something is missing, just let me know
■ Provides wide variety of simple and complex tools, such as the resistor color code conversion to the PCB Trace width tools
■ Various calculation tools available, such as the NE555 circuit calculation and the passive cooling calculator
■ Includes reference tools with millions of component specs for ICs, Transistors, FETs, Controllers with parametric searches, pinout and cross reference information, and complete datasheets
■ Provides information about Batteries, Drill sizes, Hybrid Amplifiers, Socket pinouts, package sizes and much more
■ Includes conversion tools, such as the Unit conversion tool, the HEX/Decimal/Float Tool, Frequency and AWG / SWG tools
■ Parametric search for Components with certain specs and cross references
■ Global search for terms or components across all tools
■ Customizable arrangement of tools for quick and easy access
■ Includes a scientific desktop calculator, a frequency generator, and an oscilloscope
■ Comprehensive reference glossary (english only)
■ Content can be updated "over-the-air" and amended quickly and easily
■ Store diagrams, documents, and specs of a project
■ iCloud support
■ No ads or in-app purchases
■ Can be used without Internet access
■ Special keyboard available for quicker entry of SI units
■ And much more...
Now also includes reference tools for major boards like RaspBerry Pi, Arduino, BeagleBone, TI-Launchpad, Nano Pi, Orange Pi, Banana Pi, Odroid, Cubieboard and SparkFun!
For further information about this App, just have a look at my website: ■ electronic-toolbox.com ■ or just send me an E-mail.
The new Version of the app has just been released and as always, this update is FOR FREE to all users of Electronic Toolbox.
At this point, many thanks for the ideas and suggestions I have received from the huge user community. You helped me to keep on improving my app with every new update.
This App will continue to live and grow over the time. So I still look forward to all additional ideas, suggestions or even criticism so that I can continuously improve my App.
Best regards,
Marcus
Read more on : http://go-to.me/etb
What’s new
Release notes for the latest version, as written by the developer.
This update includes the following changes and fixes:
◉ Further improvements for a next iOS Version
◉ Some bug fixes and improvements
◉ Several changes under the hood
Thanks for your great support and feedback which helps to further improve this App.
Please use the Contact Developer feature inside the App to contact me in case of questions or issues.
Stay safe and healthy!
Best regards,
Marcus
Rank history
Daily position in the France charts. #1 is at the top.
- Best rank
- #77
- Current rank
- #77
- Days charting
- 7 of 7
On the charts today
Small & simple score
How realistic it is for a small team to build something like this.
68/100
Not flagged as small & simple
- Developer size0% · 25
Developer: 10 apps on the charts
- Audience size100% · 20
Ratings: 26
- App size25% · 10
Size: 211 MB
- Price model100% · 15
Price model: paid
- Demand proof100% · 30
Best rank #2, 83 countries
An indicator, not a fact. We can't see team size. Calculated Oct 24, 2026 · method i2
How the score worksVersion history
- 14.5.01LatestReleased Sep 13, 2022