# Transformer Calc 2 vs Switch

The clearest difference is review sentiment: Switch at 64% against Transformer Calc 2's 0%. Switch also leads on price (Free vs $3.99) and rating (3.9 vs 1.0). Transformer Calc 2's advantage is update cadence (every 2 months vs every 12 months). On ads, in-app purchases and device support there is nothing between them.

Switch is free to download; Transformer Calc 2 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Switch holds the better App Store score, 3.9 against 1.0. That said, the two scores are not equally well evidenced: Switch has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of Transformer Calc 2's written reviews are positive against 64% of Switch's.

Transformer Calc 2 ships an update every 2 months, Switch every 12 months. The most recent releases landed on June 1, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | Transformer Calc 2 | Switch |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/transformer-calc-2/id1597015791/reviews) | **[3.9 (22 ratings)](https://appshunter.io/ios/app/switch-pros/id1658883630/reviews)** |
| Number of ratings | 1 | **22** |
| Positive reviews | 0.0% of reviews | **63.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 12 months |
| Monetization | Paid | **Free** |
| Size | 16 MB | 32 MB |
| Requires iOS | 26.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) | [Off Road Engineering LLC](https://appshunter.io/developer/1658883632) |

## What reviewers say

### 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


### Switch

[App page](https://appshunter.io/ios/app/switch-pros/id1658883630)

Control and program your Switch Panel Power Systems remotely via Bluetooth. Manage your SP8100, SP9100, and RCR-Force®12 systems directly from your connected device.

**Highlights:** Bluetooth connectivity, Program switch panel systems, Operate switch panel systems, Compatible with SP8100, SP9100, RCR-Force®12, Remote device control

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Transformer Calc 2 free?

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

### Is Switch free?

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

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

Switch is rated higher. Transformer Calc 2 averages 1.0 out of 5 from 1 ratings, while Switch averages 3.9 from 22 ratings.

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

Neither Transformer Calc 2 nor Switch shows ads.

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

Transformer Calc 2 ships an update every 2 months, and Switch every 12 months. Most recently, Transformer Calc 2 was updated on June 1, 2026 and Switch on July 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.*