69
BU Score
Solid
Electronic Toolbox Pro
✍️ BU Analytics Review
“
Electronic Toolbox Pro is an iOS app from Marcus Roskosch in the Productivity category, currently rated 4.7★ across 245 ratings. Initial signal reads as largely positive sentiment, users highlighting consistency and feature depth.
Our BU Score puts it at 69 — Solid (established niche player). For a Productivity app, that means established niche player.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
creator
📊 Performance Tracking LIVE
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Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 12 of 12 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| Excellent rating (4.7★)METRIC | +$2,200 | |
| worth every pennyREVIEW | +$2,000 | |
| bugsREVIEW | −$1,800 | |
| 5 starREVIEW | +$1,800 | |
| great valueREVIEW | +$1,600 | |
| excellent appREVIEW | +$1,500 | |
| Mature app (16y old)METRIC | +$1,500 | |
| highly recommendREVIEW | +$1,400 | |
| slowREVIEW | −$1,200 | |
| Localized (7 languages)METRIC | +$600 | |
| Early-stage install base (245 ratings)METRIC | +$400 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
💚Sentiment Over Time↑ green = positive · ↓ red = negative
Oct 24
Dec 24
Jan 25
Mar 25
Sep 25
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 201 MB🔞 4+📱 iOS 11.1+🔖 v14.5.01🔄 updated 3y ago🌐 EN, FR, DE, IT, ZH +2📂 Productivity💰 Paid🚀 Launched 2009 (16y old)
📝 About this app
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
"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 · v14.5.01
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
◉ 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
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Electronic Toolbox Pro
- Developer
- Marcus Roskosch
- Bundle ID
- de.roskosch.ElectronicTb
- App Store URL
- Open in App Store
- Category
- Productivity
- Content rating
- 4+
- Languages
- EN, FR, DE, IT, ZH, ES, ZH
Company
- Website
- electronic-toolbox.com
- Tagline
- Not found
- Description
- Discover Electronic Toolbox, your go-to reference and calculation resource for professionals, hobbyists, HAMs, and students. Access essential tools for electronics, RF, and circuit design, all in one app.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- Not found
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $30.6K/mo
- Top-grossing rank
- Outside top 100 in US Productivity
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- https://electronic-toolbox.com/blog/
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- Not found
📈Ratings growth245 ratings+-20% lifetimeShow 3-year history estimate ▾
Tracked (59 weeks) Pre-tracking estimate (36 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
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