# kVA Calculator vs Shutter

The clearest difference is price: kVA Calculator at Free against Shutter's $0.99. Shutter's advantage is ads (none vs shown) and update cadence (daily vs every 6 months). On ratings volume, in-app purchases and device support there is nothing between them.

kVA Calculator is free to download; Shutter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Shutter holds the better App Store score, 4.8 against 4.4. Both are backed by a comparable volume of ratings — 11 and 5 respectively. Written reviews point the same way: 42% of kVA Calculator's written reviews are positive against 50% of Shutter's.

kVA Calculator ships an update every 6 months, Shutter daily. The most recent releases landed on August 24, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | kVA Calculator | Shutter |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.4 (11 ratings)](https://appshunter.io/ios/app/kva-calculator/id467407057/reviews) | **[4.8 (5 ratings)](https://appshunter.io/ios/app/shutter-speed-angle/id1553718420/reviews)** |
| Number of ratings | **11** | 5 |
| Positive reviews | 41.7% of reviews | **50.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Daily** |
| Monetization | **Ad-supported** | Paid |
| Size | 10 MB | 0 MB |
| Requires iOS | 15.0 | **13.1** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) | [Anna Koynova](https://appshunter.io/developer/1441894484) |

## What reviewers say

### kVA Calculator

[App page](https://appshunter.io/ios/app/kva-calculator/id467407057)

Easily calculate and convert electrical values like kVA, kW, Amps, Volts, and Power Factor. Supports both single and three-phase calculations for engineers working with power systems.

**Highlights:** Calculate kVA, kW, Amps, Volts, Power Factor, Single Phase Calculations, Three Phase Calculations, Convert between electrical units, Intuitive input for two values to find the third

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

**In-app purchases:** none


### Shutter

[App page](https://appshunter.io/ios/app/shutter-speed-angle/id1553718420)

This utility app converts shutter speed to shutter angle and vice versa. It helps match exposure lengths between different cameras and frame rates, ensuring consistent visual results.

**Highlights:** Shutter speed to shutter angle conversion, Shutter angle to shutter speed conversion, Match exposure between cameras, Supports different frame rates, Simple and intuitive interface

**In-app purchases:** none


## Frequently asked questions

### Is kVA Calculator free?

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

### Is Shutter free?

Shutter costs $0.99, with no in-app purchases.

### Which has better reviews, kVA Calculator or Shutter?

Shutter is rated higher. kVA Calculator averages 4.4 out of 5 from 11 ratings, while Shutter averages 4.8 from 5 ratings.

### Do kVA Calculator or Shutter have ads?

kVA Calculator shows ads; Shutter does not.

### Which is updated more often, kVA Calculator or Shutter?

kVA Calculator ships an update every 6 months, and Shutter daily. Most recently, kVA Calculator was updated on August 24, 2026 and Shutter on September 8, 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.*