Thank you for all your feedback and support!

Over 6,000 reviews on Google Store with average score of 4.8!

I’ll be giving away promotional codes to download the PRO version for FREE!

All you have to do is leave a comment below with your name, remember to use a valid email address as I’ll need it to contact you if you win!

Latest Winners

How to Participate

Quick and Easy

Every Friday I’ll be announcing the winners here, for every 10 participants I’ll giveaway 1 promotional code, meaning if for a week 50 people comment below I’ll giveaway 5 promotional codes, so you will always have a chance of 1 to 10 to win. (which is easier than the lotto… lol)

To participate just leave a comment bellow, remember to use a valid email address, if you win I will contact you via your email.

  1. Author
    Herbert Schiller 1 year ago

    Leave a comment here and you will be participating, check on the post details about when the winners will be announced.

    Note: Remember to use a valid email address when registering to comment as this will be the only way I will be able to contact you in case you win.

    Good Luck!

    • Gerald 1 year ago

      Would be nice if you could add info about varistors

    • Abc Def 8 months ago

      Useful for me.

      • Tara C Drennen 8 months ago

        I’m in 😎

  2. Tara Drennen 1 year ago

    I’m in 😎

  3. Brendan Doherty 1 year ago

    Not surprising, this is a great app

  4. Kenny 1 year ago

    I’m in 😁

  5. Matheus 1 year ago

    Helped me a lot 🙂

  6. Stefan 1 year ago

    Nice app, thanks for creating it! 😀

  7. Maelen Dorias 1 year ago

    Nice app, this helped me a lot

  8. Andrew 1 year ago

    Great app

  9. Kadmiel 1 year ago

    Great app! Hoping to win! 🙂

  10. Patrick Losey 1 year ago

    I really like the pinout feature. Sometimes it’s hard to find stuff like that on the Googles and here it is, in an app. Thanks!

  11. Matteo Tullo 1 year ago

    Great app, thanks so much for the information


    Ótimo aplicativo esta me ajudando muito na minha área que é da elétrica .

  13. Mikołaj 1 year ago

    Nice app.☺

  14. Javier 1 year ago

    Su app es la que utilizo desde hace un tiempo, no tiene igual.
    Quisiera participar en su sorteo.

  15. Winicios 1 year ago

    The best app!!

  16. J.C. 1 year ago

    Muy buena la aplicación… Para estudiantes y profesionales

  17. Michael Knight 1 year ago

    Wow sehr gute App!!!👍

  18. Michael Knight 1 year ago

    Sehr gute App! 👍

  19. E.B. 1 year ago

    Hello, I like the app much – but one thing I’d rather like to have is a PT100 (500, 1000,…) table or – even better – calculator as I often have such R thermometers in use. For a calculator, it could also be nice to not only have R -Temp conversion, but also U, I -> Temp (for occasions where one is using constant-U or -I sources).

  20. ytterdal 1 year ago

    Excellent app!

  21. Joshua Davenport 1 year ago

    I’m a maintenance electrician. I use this app frequently and I would love to have the Pro version.

  22. Kats 1 year ago

    Very useful app!

  23. Kats 1 year ago

    Excellent job!

  24. Kouame 1 year ago

    Très bonne application qui fait son travail

  25. Crystal Skunk 1 year ago

    Super application, pratique, simple et complète !

  26. Jeroen 1 year ago

    Very useful.

  27. Jeroen 1 year ago

    Great App.

  28. Ignacio 1 year ago

    Your app its one of the best, thanks

  29. Leonardo Nascimento 1 year ago

    O melhor aplicativo sobre engenharia, gostei muito e recomendei para meus colegas de faculdade.

  30. Wesley 1 year ago

    The best app! I’m helping translate to Portuguese.

  31. JR 1 year ago

    I’m in

  32. Liviu Petcu 1 year ago

    This is a very useful application. Thank you for it!

  33. If this app wouldn’t exist it had to be invented. So useful, I recommend everyone working in that field to use it. Should be a must have for beginners.

  34. Eninspace 1 year ago

    I’m in

  35. Leon 1 year ago

    Can you add info on circuit diagra8

  36. Rancho 1 year ago

    I wanna win the pro version of this great app!!!

  37. I really like this app and would like to have the pro version 🙂

  38. Brayan Gasca 1 year ago

    Exelente aplicación, Muchas gracias por realizar está aplicacion me ha ayudado bastante para mis proyectos electrónicos, Saludos cordiales desde México

  39. Gian Luca Galazzo 12 months ago

    I really like this application
    It’s very useful

  40. RANDY 7 months ago

    Great app! I don’t use it often, however when I do, it is quite useful.

  41. Tyler Baenen 6 months ago

    Tyler here from FL. I am trying to further my knowledge base in micro electronics, and your application has helped me immensely in the process of identifiying and understanding exactly how different components of circuitry function. The calculators are extremely useful, and have probably prevented me from shorting many a micro controller. Thank you for all of your effort in creating such a great freeware app. Would love to see what the Pro Version is capable of. Keep up the great work guys!!!

  42. Amed 2 months ago

    Excellent travail!
    Merci infiniment!

  43. Sasha 2 months ago

    I’ve only just begun exploring this app, and it looks excellent, but what first strikes me is the frankness of the developer regarding the realities (necessities) of advertising revenue to support the ongoing development of our favorite apps. There are zillion apps but just a small portion of them are really great, and most of them barrage the user with ads every few minutes and demand 5-start reviews on PlayStore. Thank you for a really nice app, and your sensible approach to the revenue situation.

    • Author
      Herbert Schiller 2 months ago

      Thanks a lot for your comment Sasha, really glad when people appreciate the effort put into the app, as you pointed very well, all I ask is for people to consider supporting when they can their developers. Have a good day

  44. Dom 2 months ago

    Hello, thank you very much for this app. I’m a computer engineering student and just found your app and already love it. Valeu, Bro!

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