Circuit Playground simplifies electronics reference & calculation – so you can have more fun hacking, making, & building your projects.

• Calculate component values for Op Amp, 555, RC Filter, Resistor Divider circuits & more
• Decipher resistor & capacitor codes with ease
• Calculate power, resistance, current, and voltage with Ohm's Law & Power Calculators
• Quickly convert between decimal, hexadecimal, binary or ASCII characters
• Calculate values for multiple resistors or capacitors in series or parallel
• Pinout diagrams for widely-used ICs, connectors, & boards
• Find color for LED wavelength
• Detect a magnet's polarity
• Show off your project by submitting pics to Adafruit's Show & Tell
• Access exclusive deals from Adafruit Industries

All that, plus more functions & enhancements to come!

What’s New

Version 2.1.4

Better support for iOS13
Fixed a typo in the resistor divider equation

Ratings and Reviews

4.2 out of 5
5 Ratings

5 Ratings

- qwerty22 - ,

Great App.

Works great for me. I see the views in the other comments but I think it is fine how it is. Does everything I need and more. The only thing I would add is the common data sheets idea.

JasonNolan ,


The content is fine. Just a handy version of content you can find online. It crashes a lot though. I’ll give it 3 stars when it stops crashing.

James 11 1964 ,

Very handy app

Great app! Handy, everything I need in one spot. PDF data sheet storage is a great feature as well

App Privacy

The developer, Adafruit Industries, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer's privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


Adafruit Industries LLC
41.7 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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