# Electrical Formulator vs leaDCalc

The clearest difference is in-app purchases: leaDCalc at none against Electrical Formulator's 1. leaDCalc also leads on iOS requirement (16.0 vs 18.4). Electrical Formulator's advantage is update cadence (every 2 months vs every 11 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Electrical Formulator sells 1 one-off in-app purchase. leaDCalc asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Electrical Formulator against 5.0 for leaDCalc. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Electrical Formulator ships an update every 2 months, leaDCalc every 11 months. The most recent releases landed on September 3, 2026 and June 21, 2026 respectively.

## The numbers

| Metric | Electrical Formulator | leaDCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/electrical-formulator/id299749412/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/leadcalc/id1487509498/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 16.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | Freemium | **Free** |
| Size | 16 MB | 157 MB |
| Requires iOS | 18.4 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Vaughn Warriner](https://appshunter.io/developer/1487509497) |

## What reviewers say

### Electrical Formulator

[App page](https://appshunter.io/ios/app/electrical-formulator/id299749412)

This app provides a comprehensive suite of electrical calculation tools for design and engineering challenges. It offers hundreds of conversion and calculation options, with features to save, print, and email results. Easily access frequently used and recently accessed formulas, with all calculations automatically stored.

**Highlights:** Over 100 electrical formulas, Save and organize results, Share results via email or print, Access most-used and recent formulas, Supports US/Imperial and metric units, Formula categories for batteries, motors, transformers, and more

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Features For Electrcial | $1.99 | one-time |


### leaDCalc

[App page](https://appshunter.io/ios/app/leadcalc/id1487509498)

This app calculates direct current power lead sizes for telephone company central office power plants. It uses a circular slide rule format to determine allowable voltage drops and wire sizes based on specific system parameters.

**Highlights:** Circular slide rule format, Calculates allowable voltage drops, Determines DC power lead sizes, Supports 48V and 24V DC systems, References Bell System calculations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Electrical Formulator free?

Electrical Formulator is free to download, with in-app purchases available.

### Is leaDCalc free?

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

### Which has better reviews, Electrical Formulator or leaDCalc?

Electrical Formulator and leaDCalc are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Electrical Formulator or leaDCalc have ads?

Neither Electrical Formulator nor leaDCalc shows ads.

### Which is updated more often, Electrical Formulator or leaDCalc?

Electrical Formulator ships an update every 2 months, and leaDCalc every 11 months. Most recently, Electrical Formulator was updated on September 3, 2026 and leaDCalc on June 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.*