Smith Charts

Smith Charts

by Edoardo Orzes

3 ratings
3 reviews
#193 in paid Productivity
🔧 Utilities
📊 Productivity
$3.99

Details

  • Released
  • Updated
  • December 29, 2021
  • March 31, 2025

Features

Smith Charts screenshot #1 for iPhone
Smith Charts screenshot #2 for iPhone
Smith Charts screenshot #3 for iPhone
Smith Charts screenshot #4 for iPhone
Smith Charts screenshot #5 for iPhone
Smith Charts screenshot #6 for iPhone
Smith Charts screenshot #7 for iPhone
Smith Charts screenshot #8 for iPhone
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ipad
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About

Design matching networks, analyze device parameters, and compute stability circles with this interactive tool. Supports S parameters, various components, and offers advanced engineering features for RF design. Available in dark mode and exportable to PDF.

Interactive Smith chart with drag and zoom
Design matching networks with various components
Compute stability, equi gain, and noise circles
Import S parameters from Touchstone files
Export designs to PDF, image, or file
Dark mode support
Ruler for wavelength measurement
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What's New in Smith Charts

3.0.1

March 31, 2025

A complete redesign of the app, with tons of new features! - Matching networks design: choose among many components and see on the chart the obtained impedance - Use sliders to see how the impedance changes varying the properties of the components - Network parameters conversions (S, Z, Y, h) - Termination conversions (Γ, Z, Y) - Touchstone compatibility (one / two ports) - Export to file, image or PDF (3.0.1 bug fixes)

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Charts

Top Paid

📉 193-15

Productivity

This app dropped -15 positions in Productivity chart.

Last updated on July 28, 2026.

User reviews

nice

can you add the Y version of smith chart as well

Gives completely wrong impedance values

I bought app specifically because the description said it would give you the specific coordinate values, including the magnitude and angle of the impedance and I wanted to get precise values instead of estimating from a paper chart. Well it does do that, but the values it gives are utter nonsense. I have no idea where it’s getting its numbers from, but they have no clear relationship to the actual coordinates on the chart. I’m very disappointed.
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Response from developer

Hello, I’m sorry for this, please contact me with the email support to solve. Anyway the values you see are correct, the ones that appears on the top right corner tapping on the chart are denormalisied (multiplied by 50ohm): The ones on top are the modulo and phase, on bottom the corresponding impedance, then the values on the red dot are the Cartesian coordinates relative to the plane. Again, if that does not makes sense, please contact me. Thanks.

Nice try but the lines (all) appear zigzag when zooming in.

Nice try but the lines (all) appear zigzag when zooming in (or without zooming in). Could you please try fixing this big flaw so I can start using my iPad Pro 12.9” (2018) for this application?

Overall, lines don’t look good.

With Kind Regards!!!

Response from developer

I really appreciated your comment. Soon an update will fix this issue. Thanks!

Developer apps

FAQ

What is Smith Charts used for?

Smith Charts is used for designing matching networks, analyzing device parameters, and computing stability and noise circles in RF engineering. It provides an interactive digital representation of the Smith chart for faster and more efficient use compared to physical charts.

What devices does Smith Charts support?

Smith Charts is available for iPhone, iPad, and Mac devices with Apple Silicon. This broad compatibility allows users to work on their projects across different Apple platforms.

Can I import data into Smith Charts?

Yes, you can import S parameters from Touchstone files directly into Smith Charts. This feature allows for seamless integration with existing project data and external measurement equipment.

What types of components can be used for matching networks?

Smith Charts supports a variety of electronic components for designing matching networks, including L, C, R, Z, and transmission lines (parallel or series stubs). Parasites can also be specified for each component.

Does Smith Charts offer dark mode?

Yes, Smith Charts includes a dark mode option, which can enhance user experience and reduce eye strain during extended use, especially in low-light conditions.

How can I export my designs from Smith Charts?

You can export your designs from Smith Charts in multiple formats, including PDF, image files, and standard files. This makes it easy to share your work or incorporate it into reports and presentations.

What is the price of Smith Charts?

Smith Charts is a paid application priced at $3.99. This one-time purchase grants access to all its features for RF engineering and design.

How often is Smith Charts updated?

Smith Charts was last updated on March 31, 2025, with version 3.0.1. This indicates a commitment to ongoing development and improvements for the application.