# PAcalculate vs ISINAC AR PLUS

The clearest difference is update cadence: ISINAC AR PLUS at weekly against PAcalculate's every 4 months. PAcalculate's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PAcalculate ships an update every 4 months, ISINAC AR PLUS weekly. The most recent releases landed on October 1, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | PAcalculate | ISINAC AR PLUS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/pacalculate/id793460437/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Free | — |
| Size | 3 MB | 16 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jose Brusi](https://appshunter.io/developer/793460440) | [ISINAC ACOUSTIC WORLD SLU](https://appshunter.io/developer/6773112060) |

## 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


### ISINAC AR PLUS

[App page](https://appshunter.io/ios/app/isinac-ar-plus/id6786779719)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PAcalculate free?

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

### Is ISINAC AR PLUS free?

ISINAC AR PLUS is free to download, with no in-app purchases.

### Do PAcalculate or ISINAC AR PLUS have ads?

Neither PAcalculate nor ISINAC AR PLUS shows ads.

### Which is updated more often, PAcalculate or ISINAC AR PLUS?

PAcalculate ships an update every 4 months, and ISINAC AR PLUS weekly. Most recently, PAcalculate was updated on October 1, 2026 and ISINAC AR PLUS on October 4, 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.*