# Electrical Power vs Engineering Formulas

The clearest difference is in-app purchases: Electrical Power at none against Engineering Formulas's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Engineering Formulas sells 3 in-app purchases, starting at $4.99 per 7 days. Electrical Power asks for nothing beyond the download.

## The numbers

| Metric | Electrical Power | Engineering Formulas |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 31 MB | 45 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Bashar Tasslak](https://appshunter.io/developer/1615561399) | [Mobin Akhter](https://appshunter.io/developer/1812505286) |

## What reviewers say

### Electrical Power

[App page](https://appshunter.io/ios/app/electrical-power/id6739251763)

**Features:** macOS Compatibility

**In-app purchases:** none


### Engineering Formulas

[App page](https://appshunter.io/ios/app/engineering-formulas-engiref/id6758258119)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $4.99 | per 7 days |
| Yearly Premium | $29.99 | per year |
| Lifetime Access | $54.99 | one-time |


## Frequently asked questions

### Is Electrical Power free?

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

### Is Engineering Formulas free?

Engineering Formulas is free to download, with in-app purchases available.

### Do Electrical Power or Engineering Formulas have ads?

Neither Electrical Power nor Engineering Formulas shows ads.

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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.*