# Power Calculator vs ROE Calculator

The clearest difference is rating: Power Calculator at 4.5 against ROE Calculator's 4.0. ROE Calculator's advantage is review sentiment (100% vs 84%) and iOS requirement (15.1 vs 17.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Power Calculator holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews complicate that: 84% of Power Calculator's written reviews are positive against 100% of ROE Calculator's, so the app with the better star average is not the one people write more warmly about.

Power Calculator ships an update every 2 months, ROE Calculator every 6 weeks. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Power Calculator | ROE Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/power-calculator/id454548791/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/roe-calculator/id6443583117/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 84.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 2 MB | 29 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Power Continuity Limited](https://appshunter.io/developer/454548794) | [ROE Visual Co., Ltd](https://appshunter.io/developer/966467215) |

## 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


### ROE Calculator

[App page](https://appshunter.io/ios/app/roe-calculator/id6443583117)

This application provides essential technical calculations for LED screens, including ballast, pixel, and power requirement analysis. It's designed to be the ultimate tool for LED technicians during on-site work and production preparation.

**Highlights:** Ballast calculation, Pixel and resolution calculation, Power requirement analysis, Technical calculations for LED screens, On-site and preparation tools

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Power Calculator free?

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

### Is ROE Calculator free?

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

### Which has better reviews, Power Calculator or ROE Calculator?

Power Calculator is rated higher. Power Calculator averages 4.5 out of 5 from 2 ratings, while ROE Calculator averages 4.0 from 1 ratings.

### Do Power Calculator or ROE Calculator have ads?

Neither Power Calculator nor ROE Calculator shows ads.

### Which is updated more often, Power Calculator or ROE Calculator?

Power Calculator ships an update every 2 months, and ROE Calculator every 6 weeks. Most recently, Power Calculator was updated on October 24, 2026 and ROE Calculator on October 10, 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.*