kVA Calculator vs Shutter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
kVA Calculator
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.
- 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
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This kVA Calculator is the essential electrical calculator for electricians and engineers. Quickly convert or calculate kVA, kW and Power Factor or kVA, Volts and Amps — no more manual formula lookups. Perfect for converting kVA to Amps, or kW to KVA when sizing generators or UPS systems. Includes Single Phase and Three Phase, kW and kVA electrical calculations. Enter any two values to calculate the third. kVA Single Phase (1-Phase) Calculations: - Calculate kVA. - Calculate Volts. - Calculate Amps. kVA Three Phase (3-Phase) Calculations: - Calculate kVA. - Calculate Volts. - Calculate Amps. kVA, Power Factor & kW Calculations: - Calculate kVA. - Calculate Power Factor. - Calculate kW. Electrical units are measured in the following: Current (I) = Amps. Power (P) = Watts (or kW). Volts (V) = Voltage. Supports dark mode and 16 languages. Simple, fast, and accurate — the kVA calculator you'll reach for every day. Trusted by the professionals since 2011.
Shutter
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.
- Shutter speed to shutter angle conversion
- Shutter angle to shutter speed conversion
- Match exposure between cameras
- Supports different frame rates
- Simple and intuitive interface
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Simple Shutter Speed to Shutter Angle and converse calculator. It can be helpful if you need match exposure length between primary photo camera to cinema camera, on same or different frame rates.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | kVA Calculator | Shutter |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.4 (11 ratings) | 4.8 (5 ratings) — better |
| Positive reviews | 41.7% of reviews | 50.0% of reviews — better |
| Number of ratings | 11 — better | 5 |
| Update frequency | Every 6 months | Daily — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 15.0 | 13.1 — better |
| Further details — not scored | ||
| Size | 10 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | Pro Certs Software Ltd | Anna Koynova |
Customer experience
kVA Calculator
Shutter
In-app purchases
kVA Calculator
No in-app purchases
Shutter
No in-app purchases
