# PAcalculate vs Signals Generator

The clearest difference is in-app purchases: PAcalculate at none against Signals Generator's 14. PAcalculate also leads on review sentiment (100% vs 67%) and update cadence (every 4 months vs every 33 months). Signals Generator's advantage is ratings volume (30 vs 7). On price, ads and device support there is nothing between them.

Both are free to download. Signals Generator sells 14 one-off in-app purchases. PAcalculate asks for nothing beyond the download.

PAcalculate holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 7 and 30 respectively. Written reviews point the same way: 100% of PAcalculate's written reviews are positive against 67% of Signals Generator's.

PAcalculate ships an update every 4 months, Signals Generator every 33 months. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PAcalculate | Signals Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/pacalculate/id793460437/reviews)** | [4.7 (30 ratings)](https://appshunter.io/ios/app/signals-generator/id1526653387/reviews) |
| Number of ratings | 7 | **30** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 33 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 3 MB | 15 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Jose Brusi](https://appshunter.io/developer/793460440) | [怀卫 张](https://appshunter.io/developer/1252544375) |

## 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


### Signals Generator

[App page](https://appshunter.io/ios/app/signals-generator/id1526653387)

Transform your mobile device into a dual-channel signal generator for sound and audio electric signals. Offers a wide variety of waveform types and customizable parameters like amplitude, frequency, and phase. Ideal for professionals and hobbyists for signal generation and circuit measurement.

**Highlights:** Dual-channel signal generation, Multiple waveform types, Adjustable amplitude, frequency, and phase, Independent channel control, Zoomable waveform display, Interface color selection

**Features:** Vision Pro support

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sine Wave | $0.99 | one-time |
| Square Wave | $0.99 | one-time |
| Gaussian Noise | $0.99 | one-time |
| Uniformly distributed noise | $0.99 | one-time |
| Pink Noise | $0.99 | one-time |
| Red (brown) noise | $0.99 | one-time |
| Maximum Length Sequence | $0.99 | one-time |
| Rayleigh Noise | $0.99 | one-time |
| Sawtooth Wave | $0.99 | one-time |
| Gamma Noise | $0.99 | one-time |
| Functional Wave | $2.99 | one-time |
| Sweep Signal | $2.99 | one-time |
| All Noise Signals | $3.99 | one-time |
| All type of signals | $7.99 | one-time |


## Frequently asked questions

### Is PAcalculate free?

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

### Is Signals Generator free?

Signals Generator is free to download, with in-app purchases available.

### Which has better reviews, PAcalculate or Signals Generator?

PAcalculate is rated higher. PAcalculate averages 5.0 out of 5 from 7 ratings, while Signals Generator averages 4.7 from 30 ratings.

### Do PAcalculate or Signals Generator have ads?

Neither PAcalculate nor Signals Generator shows ads.

### Which is updated more often, PAcalculate or Signals Generator?

PAcalculate ships an update every 4 months, and Signals Generator every 33 months. Most recently, PAcalculate was updated on October 17, 2026 and Signals Generator on October 24, 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.*