# Electrical Formulator vs One Sansome

The clearest difference is in-app purchases: One Sansome at none against Electrical Formulator's 1. One Sansome also leads on update cadence (fortnightly vs every 2 months) and iOS requirement (15.6 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. One Sansome asks for nothing beyond the download.

Electrical Formulator ships an update every 2 months, One Sansome fortnightly. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Electrical Formulator | One Sansome |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/electrical-formulator/id299749412/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 15.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Freemium | — |
| Size | 16 MB | 173 MB |
| Requires iOS | 18.4 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Barker Pacific Group, Inc](https://appshunter.io/developer/1679424876) |

## 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 |


### One Sansome

[App page](https://appshunter.io/ios/app/one-sansome/id6748914397)

**Features:** macOS Compatibility, Apple Wallet, 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 One Sansome free?

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

### Do Electrical Formulator or One Sansome have ads?

Neither Electrical Formulator nor One Sansome shows ads.

### Which is updated more often, Electrical Formulator or One Sansome?

Electrical Formulator ships an update every 2 months, and One Sansome fortnightly. Most recently, Electrical Formulator was updated on October 6, 2026 and One Sansome on October 14, 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.*