# Impedance Calculators vs Voltages S

The clearest difference is price: Impedance Calculators at Free against Voltages S's $0.99. Voltages S's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Impedance Calculators is free to download; Voltages S costs $0.99 up front. Impedance Calculators sells 1 one-off in-app purchase. Voltages S asks for nothing beyond the download.

Impedance Calculators ships an update every 21 months, Voltages S every 7 months. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Impedance Calculators | Voltages S |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (13 ratings)](https://appshunter.io/ios/app/impedance-calculators/id1571901358/reviews)** | — |
| Number of ratings | **13** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 21 months | **Every 7 months** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 2 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Frank Kowalewski](https://appshunter.io/developer/291362867) |

## What reviewers say

### Impedance Calculators

[App page](https://appshunter.io/ios/app/impedance-calculators/id1571901358)

This app provides 8 calculators for electrical impedance calculations. It covers various combinations of resistors, inductors, and capacitors in series and parallel circuits, offering formulas and circuit diagrams.

**Highlights:** Series impedance calculator, Parallel impedance calculator, R, L, & C circuit calculations, Includes formulas, Circuit diagrams provided, 8 distinct calculators

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Voltages S

[App page](https://appshunter.io/ios/app/voltages-s/id6739780795)

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

**In-app purchases:** none


## Frequently asked questions

### Is Impedance Calculators free?

Impedance Calculators is free to download, with in-app purchases available.

### Is Voltages S free?

Voltages S costs $0.99, with no in-app purchases.

### Do Impedance Calculators or Voltages S have ads?

Impedance Calculators shows ads; Voltages S does not.

### Which is updated more often, Impedance Calculators or Voltages S?

Impedance Calculators ships an update every 21 months, and Voltages S every 7 months. Most recently, Impedance Calculators was updated on October 23, 2026 and Voltages S on October 21, 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.*