Electronics Engineer Helper 4+

Calculators and references

Rostyslav Dovhaliuk

    • 4.7 • 12 Ratings
    • Free
    • Offers In-App Purchases


One of the best apps for anyone interested in electronics. More than 100 thousands users use this app in their work or study. This app has the following calculators and references:
• Datasheet search
• Resistor color and digit marking (4, 5 and 6 band color code; 2 symbols, 3/4 digit and EIA-96 code SMD resistors code)
• Electronic schematic symbols (IEC 60617, IEEE 315 and GOST standards)
• Pinouts Guide (DVI, USB, Display Port, VGA, HDMI, Thunderbolt, Apple, RS-232/422/485, ATX, RCA, MIDI, XLR, Audio Jack, Arduino, Orange Pi, STM32, ESP32, and Raspberry Pi)
• Ohm's law calculator
• AWG converter (wire diameter, cross-section area, resistance and maximum current)
• Resistor for LED
• Voltage divider
• Capacitor code
• Capacitor markings
• Capacitor ESR tables
• Frequency response curve calculation of passive filters (RC, RL, RLC, LC)
• Inductor color code
• Linear current regulator
• SMD packages list
• Reactance
• PCB trace resistance

Additionally, by purchasing the PRO version of the app, you will get access to additional tools:
• SMD components marking codes
• Diodes color code (Pro Electron, JEDEC and JIS-C-7012 standards)
• Linear voltage regulator
• Resistor value to color marking converter
• Voltage rectifier
• Series or parallel electrical components' connection calculator
• Diode voltage drop
• Minimum PCB trace width
• Analog to digital conversion

The PRO subscription is an auto-renewable subscription. The price of subscription is $1.49 per year, includes 3 months free trial. Price may vary by location. The free trial is available only for users who subscribe for the first time.
Payment will be charged to iTunes Account at confirmation of purchase or the end of the Free Trial Period, if any.
Account will be charged for renewal within 24-hours prior to the end of the current period, with the same amount as the first period.
Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.
Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase.

Privacy Policy: https://rengate.github.io/EE-Helper-ToU-and-PP/PP.html
Terms of Use: https://rengate.github.io/EE-Helper-ToU-and-PP/ToU.html

What’s New

Version 22.06

• Added PCI Express x1, x4, x8 and x16 pinouts.
• Extended the list of datasheets sources.
• Improved look of drop down lists.
• Other small user interface improvements.
Big thank you to everybody who either subscribed or purchased the app's PRO version. Your support helps to make this app even better. If you like this app, please rate it and leave a review.

Ratings and Reviews

4.7 out of 5
12 Ratings

12 Ratings

Mosefts Rule ,

Easy to use, Awesome, Well designed!!!

I have used many helper apps before, none have ever had this depth, precision, and though that was put into this one. While not only visually well thought out, the tools are sorted into logical categories that make them easy to find. The best part is that the pro features are not the core features of the app like they are in many other apps, for once I have an app the is helpful and functional without being stuck behind a paywall! While I have yet to get the pro features, they only add to the apps usefulness, rather than detracting for its core functionality like every other app for this purpose I have ever used. I am also impressed with the software. There are no hidden bugs! Nothing that you get stuck on, that takes a few tries, or that otherwise wastes your time. This app works well reliably and has saved me so much time and headache. I would recommend it to any electrical engineer out there looking for a helper.

Developer Response ,

Thank you very much for the detailed review. I'm very glad that the app suits your needs 🙂

i am dummm ,

Everything you need to get started!

This app is amazing! It has absolutely everything you could possibly need as a beginner to Electronics. I haven’t noticed any problems with it. And nothing is locked! With other apps, some of the features have a lock buy them telling you to get the full version. With this app you don’t feel like you’re getting left out on everything because they just don’t show you everything you can’t use. Get this app!

Developer Response ,

Thanks for a review. I hope that EE Helper will be helpful for your electronics study 🔋

to weak to continue ,


I’m an older guy 60 plus years old . This a world of information. I’m actually just a maintenance guy at a college. I share this app with several engineering students. They flipped out when they found this app.. Really you people did you’re home work . Thanks for sharing this app and information

Developer Response ,

Thank you very much for such a great feedback. I'm glad that this app helps you 🙂

App Privacy

The developer, Rostyslav Dovhaliuk, 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 Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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