# Inductor Calculator Master vs Transformer Calculation Tool

The clearest difference is ads: Transformer Calculation Tool at none against Inductor Calculator Master's shown. Inductor Calculator Master's advantage is update cadence (daily vs every 4 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Inductor Calculator Master sells 2 one-off in-app purchases and Transformer Calculation Tool sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Inductor Calculator Master ships an update daily, Transformer Calculation Tool every 4 weeks. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Inductor Calculator Master | Transformer Calculation Tool |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 4 weeks |
| Size | 33 MB | 57 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Le Minh Tran](https://appshunter.io/developer/1896777000) | [Shraddhaben Parmar](https://appshunter.io/developer/1889769325) |

## What reviewers say

### Inductor Calculator Master

[App page](https://appshunter.io/ios/app/inductor-calculator-master/id6772124135)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Premium Upgrade | $1.99 | one-time |


### Transformer Calculation Tool

[App page](https://appshunter.io/ios/app/transformer-calculation-tool/id6772152007)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is Inductor Calculator Master free?

Inductor Calculator Master is free to download, with in-app purchases available.

### Is Transformer Calculation Tool free?

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

### Do Inductor Calculator Master or Transformer Calculation Tool have ads?

Inductor Calculator Master shows ads; Transformer Calculation Tool does not.

### Which is updated more often, Inductor Calculator Master or Transformer Calculation Tool?

Inductor Calculator Master ships an update daily, and Transformer Calculation Tool every 4 weeks. Most recently, Inductor Calculator Master was updated on October 21, 2026 and Transformer Calculation Tool on October 20, 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.*