# Noise Calc vs On

The clearest difference is rating: On at 5.0 against Noise Calc's 1.0. On also leads on update cadence (every 3 weeks vs every 11 months) and ratings volume (6 vs 1). Noise Calc's advantage is in-app purchases (none vs 2) and iOS requirement (15.1 vs 17). On price, ads and device support there is nothing between them.

Both are free to download. On sells 2 one-off in-app purchases. Noise Calc asks for nothing beyond the download.

On holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: On has 6 ratings behind it against 1, so its average is the more settled of the two.

Noise Calc ships an update every 11 months, On every 3 weeks. The most recent releases landed on September 24, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | Noise Calc | On |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/noise-calc/id1556882174/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/on-axis/id6446842774/reviews)** |
| Number of ratings | 1 | **6** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 39 MB | 20 MB |
| Requires iOS | **15.1** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Lorenzo Rizzi](https://appshunter.io/developer/856070642) | [OK-Sound](https://appshunter.io/developer/1679335942) |

## What reviewers say

### Noise Calc

[App page](https://appshunter.io/ios/app/noise-calc/id1556882174)

This calculator estimates outdoor and semi-reverberant noise levels. It's designed for acoustic technicians and professionals dealing with machine noise, offering tools for logarithmic summation and difference, sound pressure attenuation, and noise reduction from barriers.

**Highlights:** Logarithmic summation of decibels, Logarithmic difference in decibels, Sound pressure attenuation with distance, Free-field sound propagation, Sound-insulating barrier noise reduction, Outdoor machinery noise compliance estimation

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

**In-app purchases:** none


### On

[App page](https://appshunter.io/ios/app/on-axis/id6446842774)

This utility app helps audio professionals quickly measure and model audience areas for event and touring setups. It offers a streamlined workflow compatible with popular loudspeaker simulation programs, speeding up the design process. Users can create 3D models of listening areas and generate profiles along speaker axes.

**Highlights:** Audience area measurement, 3D listening area modeling, Speaker axis profiling, Bluetooth laser distance finder integration, Export to loudspeaker simulation software, 14-day free trial

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Unlock App | $149.99 | one-time |


## Frequently asked questions

### Is Noise Calc free?

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

### Is On free?

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

### Which has better reviews, Noise Calc or On?

On is rated higher. Noise Calc averages 1.0 out of 5 from 1 ratings, while On averages 5.0 from 6 ratings.

### Do Noise Calc or On have ads?

Neither Noise Calc nor On shows ads.

### Which is updated more often, Noise Calc or On?

Noise Calc ships an update every 11 months, and On every 3 weeks. Most recently, Noise Calc was updated on September 24, 2026 and On on July 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*