# Circuit Laboratory HD vs Voltage Drop Calculators

The clearest difference is update cadence: Voltage Drop Calculators at every 7 months against Circuit Laboratory HD's every 27 months. Voltage Drop Calculators also leads on price ($3.99 vs $6.99) and device support (3 vs 1). Circuit Laboratory HD's advantage is iOS requirement (12.4 vs 15.6). On ads, in-app purchases and monetization model there is nothing between them.

Circuit Laboratory HD costs $6.99 and Voltage Drop Calculators $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Circuit Laboratory HD ships an update every 27 months, Voltage Drop Calculators every 7 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Circuit Laboratory HD | Voltage Drop Calculators |
| --- | --- | --- |
| Price | $6.99 | **$3.99** |
| Rating | — | **[4.0 (4 ratings)](https://appshunter.io/ios/app/voltage-drop-calculators/id6464050324/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 27 months | **Every 7 months** |
| Monetization | Paid | Paid |
| Size | 180 MB | 67 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fabrizio Boco](https://appshunter.io/developer/466239616) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## What reviewers say

### Circuit Laboratory HD

[App page](https://appshunter.io/ios/app/circuit-laboratory-hd/id1056997109)

This app allows users to design and analyze electronic circuits graphically. It supports various analysis types including DC, AC, multifrequency AC, and transient, with a wide range of components and measuring instruments.

**Highlights:** Graphical circuit design, DC analysis, AC analysis, Multifrequency AC analysis, Transient analysis, Component library, Measuring instruments

**Features:** macOS Compatibility

**In-app purchases:** none


### Voltage Drop Calculators

[App page](https://appshunter.io/ios/app/voltage-drop-calculators/id6464050324)

This tool helps electrical professionals and students perform quick and accurate voltage drop calculations. It features a user-friendly interface, a material database, and the ability to save circuit details for efficient system design and compliance.

**Highlights:** Fast voltage drop calculations, Built-in material database, Custom material support, Save circuit details, Unit conversion, Recommended wire size guidance

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

**In-app purchases:** none


## Frequently asked questions

### Is Circuit Laboratory HD free?

Circuit Laboratory HD costs $6.99, with no in-app purchases.

### Is Voltage Drop Calculators free?

Voltage Drop Calculators costs $3.99, with no in-app purchases.

### Do Circuit Laboratory HD or Voltage Drop Calculators have ads?

Neither Circuit Laboratory HD nor Voltage Drop Calculators shows ads.

### Which is updated more often, Circuit Laboratory HD or Voltage Drop Calculators?

Circuit Laboratory HD ships an update every 27 months, and Voltage Drop Calculators every 7 months. Most recently, Circuit Laboratory HD was updated on November 2, 2026 and Voltage Drop Calculators on November 3, 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.*