# DigiCompCalc vs Inductor Design Pro

The clearest difference is in-app purchases: DigiCompCalc at none against Inductor Design Pro's 1. Inductor Design Pro's advantage is update cadence (every 3 weeks vs every 68 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Inductor Design Pro sells 1 in-app purchase, starting at $29.99 per year. DigiCompCalc asks for nothing beyond the download.

DigiCompCalc ships an update every 68 months, Inductor Design Pro every 3 weeks. The most recent releases landed on October 22, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | DigiCompCalc | Inductor Design Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/digicompcalc/id559620424/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 68 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 9 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ernie Zappacosta](https://appshunter.io/developer/509385502) | [建忠 徐](https://appshunter.io/developer/1871049057) |

## What reviewers say

### DigiCompCalc

[App page](https://appshunter.io/ios/app/digicompcalc/id559620424)

This utility app simplifies digital power compensator coefficient calculations. It allows users to input data and obtain results directly on their mobile device, eliminating the need for complex desktop software. Results can be emailed for easy sharing.

**Highlights:** Calculate coefficients from analog compensator values, Calculate coefficients directly using poles and zeros, Email results, Remembers last calculated variables, Dark Mode support

**Features:** macOS Compatibility

**In-app purchases:** none


### Inductor Design Pro

[App page](https://appshunter.io/ios/app/inductor-design-pro/id6758878884)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $29.99 | per year |


## Frequently asked questions

### Is DigiCompCalc free?

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

### Is Inductor Design Pro free?

Inductor Design Pro is free to download, with in-app purchases available.

### Do DigiCompCalc or Inductor Design Pro have ads?

Neither DigiCompCalc nor Inductor Design Pro shows ads.

### Which is updated more often, DigiCompCalc or Inductor Design Pro?

DigiCompCalc ships an update every 68 months, and Inductor Design Pro every 3 weeks. Most recently, DigiCompCalc was updated on October 22, 2026 and Inductor Design Pro on October 10, 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.*