# Phase Calc vs Transformer Calc 2

The clearest difference is review sentiment: Phase Calc at 100% against Transformer Calc 2's 0%. Phase Calc also leads on rating (5.0 vs 1.0) and price ($1.99 vs $3.99). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Phase Calc costs $1.99 and Transformer Calc 2 $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Phase Calc holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 100% of Phase Calc's written reviews are positive against 0% of Transformer Calc 2's.

Phase Calc ships an update every 6 weeks, Transformer Calc 2 every 2 months. The most recent releases landed on August 1, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Phase Calc | Transformer Calc 2 |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/phase-calc/id837266300/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/transformer-calc-2/id1597015791/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Paid | Paid |
| Size | 13 MB | 16 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


### Transformer Calc 2

[App page](https://appshunter.io/ios/app/transformer-calc-2/id1597015791)

This app provides electricians with instant transformer sizing and advanced construction math, compliant with both US (NEC 2023) and Canadian (CEC 2024) electrical codes. It simplifies complex calculations for wire, conduit, and overcurrent protection, and includes a fractional construction calculator.

**Highlights:** Dual code compliance (NEC 2023, CEC 2024), Instant transformer sizing, Wire and conduit sizing, Overcurrent protection calculation, Fractional construction calculator, Unit conversion, Dark mode support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Phase Calc free?

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

### Is Transformer Calc 2 free?

Transformer Calc 2 costs $3.99, with no in-app purchases.

### Which has better reviews, Phase Calc or Transformer Calc 2?

Phase Calc is rated higher. Phase Calc averages 5.0 out of 5 from 4 ratings, while Transformer Calc 2 averages 1.0 from 1 ratings.

### Do Phase Calc or Transformer Calc 2 have ads?

Neither Phase Calc nor Transformer Calc 2 shows ads.

### Which is updated more often, Phase Calc or Transformer Calc 2?

Phase Calc ships an update every 6 weeks, and Transformer Calc 2 every 2 months. Most recently, Phase Calc was updated on August 1, 2026 and Transformer Calc 2 on June 1, 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.*