# Transformer Calculator Plus vs Panel Manager

The clearest difference is price: Panel Manager at Free against Transformer Calculator Plus's $2.99. Panel Manager also leads on rating (5.0 vs 3.3) and update cadence (every 9 days vs every 45 months). Transformer Calculator Plus's advantage is in-app purchases (none vs 1) and ratings volume (4 vs 1). On ads and device support there is nothing between them.

Panel Manager is free to download; Transformer Calculator Plus costs $2.99 up front. Panel Manager sells 1 one-off in-app purchase. Transformer Calculator Plus asks for nothing beyond the download.

Panel Manager holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Transformer Calculator Plus ships an update every 45 months, Panel Manager every 9 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Transformer Calculator Plus | Panel Manager |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.3 (4 ratings)](https://appshunter.io/ios/app/transformer-calculator-plus/id1372528401/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/panel-manager/id6760704566/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 9 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 1 MB | 7 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [MICHAEL ANTHONY SLOCUM JR](https://appshunter.io/developer/1885822647) |

## What reviewers say

### Transformer Calculator Plus

[App page](https://appshunter.io/ios/app/transformer-calculator-plus/id1372528401)

This utility app calculates key parameters for transformers, including voltage, current, and turns ratio. It helps determine if a transformer is step-up or step-down, essential for power conversion applications.

**Highlights:** Calculate primary and secondary voltage, Calculate primary and secondary current, Calculate transformer turns ratio, Determine step-up or step-down transformer, Supports AC voltage calculations

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

**In-app purchases:** none


### Panel Manager

[App page](https://appshunter.io/ios/app/panel-manager/id6760704566)

Streamline electrical panel scheduling directly from your mobile device. Quickly add circuit details, automatically calculate loads, and generate professional PDF reports for permits and inspections. Collaborate with your crew in real-time without needing individual accounts.

**Highlights:** Real-time load calculation, Automatic space assignment, 1-phase and 3-phase support, Crew project sharing, PDF export for permits, Compact door label generation

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Panel Manager Pro | $9.99 | one-time |


## Frequently asked questions

### Is Transformer Calculator Plus free?

Transformer Calculator Plus costs $2.99, with no in-app purchases.

### Is Panel Manager free?

Panel Manager is free to download, with in-app purchases available.

### Which has better reviews, Transformer Calculator Plus or Panel Manager?

Panel Manager is rated higher. Transformer Calculator Plus averages 3.3 out of 5 from 4 ratings, while Panel Manager averages 5.0 from 1 ratings.

### Do Transformer Calculator Plus or Panel Manager have ads?

Neither Transformer Calculator Plus nor Panel Manager shows ads.

### Which is updated more often, Transformer Calculator Plus or Panel Manager?

Transformer Calculator Plus ships an update every 45 months, and Panel Manager every 9 days. Most recently, Transformer Calculator Plus was updated on October 24, 2026 and Panel Manager on October 7, 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.*