# Phase Calc vs Construction Calc

The clearest difference is price: Phase Calc at $1.99 against Construction Calc's $7.99. Phase Calc also leads on iOS requirement (17.0 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Phase Calc costs $1.99 and Construction Calc $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Phase Calc ships an update every 6 weeks, Construction Calc monthly. The most recent releases landed on August 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Phase Calc | Construction Calc |
| --- | --- | --- |
| Price | **$1.99** | $7.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/phase-calc/id837266300/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Paid | — |
| Size | 13 MB | 27 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Donnie Herman](https://appshunter.io/developer/837266303) | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) |

## What reviewers say

### Phase Calc

[App page](https://appshunter.io/ios/app/phase-calc/id837266300)

This advanced engineering app performs complex electrical calculations for three-phase power systems. It offers tools for students, technicians, and engineers to analyze unbalanced systems, perform sequence transformations, and access reference libraries. Results can be easily exported for documentation and sharing.

**Highlights:** Symmetrical component analysis, Three-phase power system calculations, Phase-to-sequence and sequence-to-phase transformations, Polar and rectangular input support, Specialized calculators and reference libraries, Exportable results for documentation

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

**In-app purchases:** none


### Construction Calc

[App page](https://appshunter.io/ios/app/construction-calc/id1551464972)

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

**In-app purchases:** none


## Frequently asked questions

### Is Phase Calc free?

Phase Calc costs $1.99, with no in-app purchases.

### Is Construction Calc free?

Construction Calc costs $7.99, with no in-app purchases.

### Do Phase Calc or Construction Calc have ads?

Neither Phase Calc nor Construction Calc shows ads.

### Which is updated more often, Phase Calc or Construction Calc?

Phase Calc ships an update every 6 weeks, and Construction Calc monthly. Most recently, Phase Calc was updated on August 1, 2026 and Construction Calc on September 21, 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.*