# Patterns Calc Pro vs Simple Noise Meter

The clearest difference is price: Simple Noise Meter at Free against Patterns Calc Pro's $12.99. Patterns Calc Pro's advantage is review sentiment (100% vs 57%) and in-app purchases (none vs 2). On update cadence, device support and iOS requirement there is nothing between them.

Simple Noise Meter is free to download; Patterns Calc Pro costs $12.99 up front. Simple Noise Meter sells 2 one-off in-app purchases. Patterns Calc Pro asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | Patterns Calc Pro | Simple Noise Meter |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/simple-noise-meter/id1630705039/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | **100.0% of reviews** | 57.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 105 MB | 42 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hikaru Satomi](https://appshunter.io/developer/1517351491) | [NAOYA ONO](https://appshunter.io/developer/1530328146) |

## What reviewers say

### Patterns Calc Pro

[App page](https://appshunter.io/ios/app/patterns-calc-pro-calculator/id1549687006)

A visually customizable calculator with a focus on ease of use and quick calculations. Offers one-handed mode, adjustable colors, and intuitive memo functions. Supports iPad and provides a simple interface for everyday math needs.

**Highlights:** One-handed mode, Automatic color changes, Easy screenshot sharing, Multiple beautiful patterns, Large, readable numbers, Intuitive memo function, Drag and drop button customization

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Noise Meter

[App page](https://appshunter.io/ios/app/simple-noise-meter/id1630705039)

Measure ambient sound levels in decibels with this straightforward utility. It provides a simple interface to start, stop, and reset noise measurements, offering a supplementary tool for understanding your environment's acoustics.

**Highlights:** Real-time decibel measurement, Start, stop, and reset functions, Calibration for accuracy, Supplementary measurement tool, Easy-to-use interface

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Developer | $0.99 | one-time |
| Remove ads | $3.99 | one-time |


## Frequently asked questions

### Is Patterns Calc Pro free?

Patterns Calc Pro costs $12.99, with no in-app purchases.

### Is Simple Noise Meter free?

Simple Noise Meter is free to download, with in-app purchases available.

### Do Patterns Calc Pro or Simple Noise Meter have ads?

Simple Noise Meter shows ads; Patterns Calc Pro does not.

### Which is updated more often, Patterns Calc Pro or Simple Noise Meter?

Patterns Calc Pro ships an update every 2 months, and Simple Noise Meter every 2 months. Most recently, Patterns Calc Pro was updated on November 3, 2026 and Simple Noise Meter on November 3, 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.*