# Electronics Circuit Calc Pro vs iSmith

The clearest difference is price: iSmith at Free against Electronics Circuit Calc Pro's $4.99. iSmith also leads on rating (5.0 vs 4.3) and update cadence (every 2 days vs every 2 months). Electronics Circuit Calc Pro's advantage is ads (none vs shown) and ratings volume (3 vs 1). On in-app purchases, device support and iOS requirement there is nothing between them.

iSmith is free to download; Electronics Circuit Calc Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iSmith holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

Electronics Circuit Calc Pro ships an update every 2 months, iSmith every 2 days. The most recent releases landed on September 27, 2026 and June 6, 2026 respectively.

## The numbers

| Metric | Electronics Circuit Calc Pro | iSmith |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/electronics-circuit-calc-pro/id1583600520/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ismith/id6444874930/reviews)** |
| Number of ratings | **3** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Paid | **Ad-supported** |
| Size | 31 MB | 7 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Anas Abubakar](https://appshunter.io/developer/1581534101) | [Ryoun Chon Shin](https://appshunter.io/developer/1657565687) |

## What reviewers say

### Electronics Circuit Calc Pro

[App page](https://appshunter.io/ios/app/electronics-circuit-calc-pro/id1583600520)

This app provides a comprehensive suite of calculators and design tools for electronic engineering projects. It assists with circuit design, filter analysis, and calculations for various components like resistors, capacitors, and inductors. Ideal for both professionals and students, it simplifies complex electronic tasks.

**Highlights:** Circuit design tools, Filter design with graph plotting, Resistor, capacitor, inductor design, Amplifier calculations, Ohm's Law calculator, 555 timer calculator, PCB trace width calculator

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### iSmith

[App page](https://appshunter.io/ios/app/ismith/id6444874930)

This app helps users understand impedance matching principles. It allows for reading key network parameters from a Smith chart and calculating various matching networks and pads. Users can also convert between different power and voltage units.

**Highlights:** Read Smith chart parameters (Z, Y, VSWR, Q, Gamma), Calculate 8 L-matching networks, Calculate T & Pi matching pads, Set matching targets on Smith chart, Learn impedance matching principles, dBm, Watts, and Volts conversion, VSWR conversion

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Electronics Circuit Calc Pro free?

Electronics Circuit Calc Pro costs $4.99, with no in-app purchases.

### Is iSmith free?

iSmith is free to download, with no in-app purchases.

### Which has better reviews, Electronics Circuit Calc Pro or iSmith?

iSmith is rated higher. Electronics Circuit Calc Pro averages 4.3 out of 5 from 3 ratings, while iSmith averages 5.0 from 1 ratings.

### Do Electronics Circuit Calc Pro or iSmith have ads?

iSmith shows ads; Electronics Circuit Calc Pro does not.

### Which is updated more often, Electronics Circuit Calc Pro or iSmith?

Electronics Circuit Calc Pro ships an update every 2 months, and iSmith every 2 days. Most recently, Electronics Circuit Calc Pro was updated on September 27, 2026 and iSmith on June 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*