# Coil Inductance Calculator vs Calculation Transformers

The clearest difference is price: Calculation Transformers at Free against Coil Inductance Calculator's $2.99. Calculation Transformers also leads on rating (5.0 vs 3.7) and update cadence (every 5 months vs every 31 months). Coil Inductance Calculator's advantage is in-app purchases (none vs 1) and ratings volume (7 vs 1). On ads and device support there is nothing between them.

Calculation Transformers is free to download; Coil Inductance Calculator costs $2.99 up front. Calculation Transformers sells 1 one-off in-app purchase. Coil Inductance Calculator asks for nothing beyond the download.

Calculation Transformers holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: Coil Inductance Calculator has 7 ratings behind it against 1, so its average is the more settled of the two.

Coil Inductance Calculator ships an update every 31 months, Calculation Transformers every 5 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Coil Inductance Calculator | Calculation Transformers |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [3.7 (7 ratings)](https://appshunter.io/ios/app/coil-inductance-calculator/id1369875316/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calculation-transformers/id6759037556/reviews)** |
| Number of ratings | **7** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 5 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 56 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) |

## What reviewers say

### Coil Inductance Calculator

[App page](https://appshunter.io/ios/app/coil-inductance-calculator/id1369875316)

Quickly and accurately calculate the inductance of various coil types. This app provides practical results for electronics hobbyists, students, and engineers with a clean, easy-to-use interface and helpful diagrams.

**Highlights:** Fast inductance calculations, Simple input for coil parameters, Clear visual coil diagram, Calculation history, Reference information, Clean user interface

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

**In-app purchases:** none


### Calculation Transformers

[App page](https://appshunter.io/ios/app/calculation-transformers/id6759037556)

This electrical engineering tool simplifies complex transformer calculations for students and professionals. It offers fast, accurate results in an easy-to-understand format, aiding in design, maintenance, and analysis.

**Highlights:** Fast transformer calculations, Clear input structure, Accurate results, Design and troubleshooting aid, User-friendly interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $9.99 | one-time |


## Frequently asked questions

### Is Coil Inductance Calculator free?

Coil Inductance Calculator costs $2.99, with no in-app purchases.

### Is Calculation Transformers free?

Calculation Transformers is free to download, with in-app purchases available.

### Which has better reviews, Coil Inductance Calculator or Calculation Transformers?

Calculation Transformers is rated higher. Coil Inductance Calculator averages 3.7 out of 5 from 7 ratings, while Calculation Transformers averages 5.0 from 1 ratings.

### Do Coil Inductance Calculator or Calculation Transformers have ads?

Neither Coil Inductance Calculator nor Calculation Transformers shows ads.

### Which is updated more often, Coil Inductance Calculator or Calculation Transformers?

Coil Inductance Calculator ships an update every 31 months, and Calculation Transformers every 5 months. Most recently, Coil Inductance Calculator was updated on November 2, 2026 and Calculation Transformers on October 31, 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.*