# Power Calculator vs Breaker Box

The clearest difference is in-app purchases: Power Calculator at none against Breaker Box's 1. Breaker Box's advantage is update cadence (every 9 days vs every 2 months) and ratings volume (108 vs 2). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Breaker Box sells 1 one-off in-app purchase. Power Calculator asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.5 for Power Calculator against 4.5 for Breaker Box. That said, the two scores are not equally well evidenced: Breaker Box has 108 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 81% of Power Calculator's written reviews are positive against 78% of Breaker Box's.

Power Calculator ships an update every 2 months, Breaker Box every 9 days. Both last shipped on November 6, 2026.

## The numbers

| Metric | Power Calculator | Breaker Box |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/power-calculator/id454548791/reviews)** | [4.5 (108 ratings)](https://appshunter.io/ios/app/breaker-box-panel-directory/id1459288663/reviews) |
| Number of ratings | 2 | **108** |
| Positive reviews | **81.0% of reviews** | 77.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 62 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Power Continuity Limited](https://appshunter.io/developer/454548794) | [Brett Pappas](https://appshunter.io/developer/1435218098) |

## What reviewers say

### Power Calculator

[App page](https://appshunter.io/ios/app/power-calculator/id454548791)

This app provides a straightforward calculator designed for the electrical industry, offering tools for power and lighting calculations. It helps users determine generator and UPS requirements, convert units, and calculate fuel consumption. Suitable for both professionals and casual users needing electrical calculations.

**Highlights:** KW, kVA, and Amps calculation, Generator requirements calculation (single/three phase), UPS requirements calculation (single/three phase), Lumens and Watts conversion, Generator fuel consumption calculation, Generator power calculation

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

**In-app purchases:** none


### Breaker Box

[App page](https://appshunter.io/ios/app/breaker-box-panel-directory/id1459288663)

Easily label and document every circuit in your electrical panel. Assign notes, rooms, and fixtures to breakers, and generate printable PDF legends for quick identification. Supports multi-panel management and cloud sync for data safety.

**Highlights:** Label circuits with notes, rooms, and fixtures, Supports tandem splits, multi-pole, GFCI, and HACR, Organize circuits by room and linked fixtures, Generate printable PDF legends for panels, Manage multiple panels and properties, Cloud sync and automatic backups

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro License | $9.99 | one-time |


## Frequently asked questions

### Is Power Calculator free?

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

### Is Breaker Box free?

Breaker Box is free to download, with in-app purchases available.

### Which has better reviews, Power Calculator or Breaker Box?

Power Calculator is rated higher. Power Calculator averages 4.5 out of 5 from 2 ratings, while Breaker Box averages 4.5 from 108 ratings.

### Do Power Calculator or Breaker Box have ads?

Neither Power Calculator nor Breaker Box shows ads.

### Which is updated more often, Power Calculator or Breaker Box?

Power Calculator ships an update every 2 months, and Breaker Box every 9 days. Most recently, Power Calculator was updated on November 6, 2026 and Breaker Box on November 6, 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.*