# Electrical Formulator vs ESP Hub

The clearest difference is in-app purchases: ESP Hub at none against Electrical Formulator's 1. ESP Hub also leads on update cadence (weekly vs every 2 months) and iOS requirement (15.0 vs 18.4). On price, ads and device support there is nothing between them.

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

Electrical Formulator ships an update every 2 months, ESP Hub weekly. The most recent releases landed on September 3, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Electrical Formulator | ESP Hub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/electrical-formulator/id299749412/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 16.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Freemium | — |
| Size | 16 MB | 62 MB |
| Requires iOS | 18.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Ahmed Nabil](https://appshunter.io/developer/1820011870) |

## 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 |


### ESP Hub

[App page](https://appshunter.io/ios/app/esp-hub/id6747144001)

**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 ESP Hub free?

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

### Do Electrical Formulator or ESP Hub have ads?

Neither Electrical Formulator nor ESP Hub shows ads.

### Which is updated more often, Electrical Formulator or ESP Hub?

Electrical Formulator ships an update every 2 months, and ESP Hub weekly. Most recently, Electrical Formulator was updated on September 3, 2026 and ESP Hub on September 19, 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.*