# Electrical Formulator vs Drop'n Volts

The clearest difference is price: Electrical Formulator at Free against Drop'n Volts's $1.99. Electrical Formulator also leads on update cadence (every 2 months vs every 6 months) and iOS requirement (18.4 vs 26.0). Drop'n Volts's advantage is in-app purchases (none vs 1). On rating, ratings volume, ads and device support there is nothing between them.

Electrical Formulator is free to download; Drop'n Volts costs $1.99 up front. Electrical Formulator sells 1 one-off in-app purchase. Drop'n Volts 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 Drop'n Volts. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Electrical Formulator ships an update every 2 months, Drop'n Volts every 6 months. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Electrical Formulator | Drop'n Volts |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/electrical-formulator/id299749412/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/dropn-volts/id6762097863/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 15.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | **Freemium** | Paid |
| Size | 16 MB | 1 MB |
| Requires iOS | **18.4** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Francisco Alcala](https://appshunter.io/developer/339407925) |

## 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 |


### Drop'n Volts

[App page](https://appshunter.io/ios/app/dropn-volts/id6762097863)

This app calculates the minimum conductor size needed for electrical installations. It accounts for load, distance, material, and phase, with options for multiple conductors, insulation types, and conduit materials. Results can be emailed for documentation.

**Highlights:** Voltage drop calculation, Conductor sizing, Single and three-phase support, NEC conduit fill compliance, Multiple conductor support, Email detailed results

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

**In-app purchases:** none


## Frequently asked questions

### Is Electrical Formulator free?

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

### Is Drop'n Volts free?

Drop'n Volts costs $1.99, with no in-app purchases.

### Which has better reviews, Electrical Formulator or Drop'n Volts?

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

### Do Electrical Formulator or Drop'n Volts have ads?

Neither Electrical Formulator nor Drop'n Volts shows ads.

### Which is updated more often, Electrical Formulator or Drop'n Volts?

Electrical Formulator ships an update every 2 months, and Drop'n Volts every 6 months. Most recently, Electrical Formulator was updated on October 6, 2026 and Drop'n Volts on October 13, 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.*