# PAcalculate vs Harmonic Wave Equation Calc

The clearest difference is price: PAcalculate at Free against Harmonic Wave Equation Calc's $2.99. PAcalculate also leads on update cadence (every 4 months vs every 31 months) and ratings volume (7 vs 1). On rating, ads, in-app purchases and device support there is nothing between them.

PAcalculate is free to download; Harmonic Wave Equation Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for PAcalculate against 5.0 for Harmonic Wave Equation Calc. That said, the two scores are not equally well evidenced: PAcalculate has 7 ratings behind it against 1, so its average is the more settled of the two.

PAcalculate ships an update every 4 months, Harmonic Wave Equation Calc every 31 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | PAcalculate | Harmonic Wave Equation Calc |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/pacalculate/id793460437/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/harmonic-wave-equation-calc/id1412323951/reviews) |
| Number of ratings | **7** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 31 months |
| Monetization | **Free** | Paid |
| Size | 3 MB | 1 MB |
| Requires iOS | 13.0 | 13 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jose Brusi](https://appshunter.io/developer/793460440) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### PAcalculate

[App page](https://appshunter.io/ios/app/pacalculate/id793460437)

This app provides 28 calculators and reference information for professional audio sound reinforcement and lighting. It covers acoustics, audio electronics, cabling, and lighting calculations, making it a valuable tool for audio and lighting professionals.

**Highlights:** 28 calculators for pro-audio and lighting, Acoustics calculations (SPL, air absorption), Audio electronics calculations (dBu/dBV, Q/B/W), Cabling calculations (speaker cable loss), Lighting calculations (DMX, RGB/CMY), Reference info (pinouts, graphs)

**Features:** macOS Compatibility

**In-app purchases:** none


### Harmonic Wave Equation Calc

[App page](https://appshunter.io/ios/app/harmonic-wave-equation-calc/id1412323951)

This physics and math calculator quickly determines wave properties like displacement, velocity, and amplitude. It provides instant calculations with copyable results and includes reference formulas. Optimized for everyday use, it supports high precision and various units.

**Highlights:** Instant wave calculations, Copyable results, Included reference formulas, Supports 16 decimal places, Multiple unit support, Ad-free and private

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

**In-app purchases:** none


## Frequently asked questions

### Is PAcalculate free?

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

### Is Harmonic Wave Equation Calc free?

Harmonic Wave Equation Calc costs $2.99, with no in-app purchases.

### Which has better reviews, PAcalculate or Harmonic Wave Equation Calc?

PAcalculate and Harmonic Wave Equation Calc are both rated 5.0 out of 5 on the App Store, from 7 and 1 ratings respectively.

### Do PAcalculate or Harmonic Wave Equation Calc have ads?

Neither PAcalculate nor Harmonic Wave Equation Calc shows ads.

### Which is updated more often, PAcalculate or Harmonic Wave Equation Calc?

PAcalculate ships an update every 4 months, and Harmonic Wave Equation Calc every 31 months. Most recently, PAcalculate was updated on November 1, 2026 and Harmonic Wave Equation Calc on November 2, 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.*