# On vs ARCQ SPL

The clearest difference is price: On at Free against ARCQ SPL's $5.99. ARCQ SPL's advantage is in-app purchases (none vs 2) and update cadence (every 2 days vs every 3 weeks). On ads, device support and iOS requirement there is nothing between them.

On is free to download; ARCQ SPL costs $5.99 up front. On sells 2 one-off in-app purchases. ARCQ SPL asks for nothing beyond the download.

On ships an update every 3 weeks, ARCQ SPL every 2 days. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | On | ARCQ SPL |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/on-axis/id6446842774/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 20 MB | 2 MB |
| Requires iOS | 17 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [OK-Sound](https://appshunter.io/developer/1679335942) | [JRB LAB](https://appshunter.io/developer/6782095828) |

## What reviewers say

### 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 |


### ARCQ SPL

[App page](https://appshunter.io/ios/app/arcq-spl-spl-meter/id6782095826)

Transform your device into a precision sound pressure level meter. Analyze real-time A- and C-weighted measurements, view live spectrum analysis, and utilize flexible input options for accurate audio monitoring.

**Highlights:** Real-time A- and C-weighted measurements, Octave-band spectrum analyzer, Flexible input options (built-in, USB, Bluetooth), Simultaneous metric display, Customizable averaging windows, On-device processing for privacy

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is On free?

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

### Is ARCQ SPL free?

ARCQ SPL costs $5.99, with no in-app purchases.

### Do On or ARCQ SPL have ads?

Neither On nor ARCQ SPL shows ads.

### Which is updated more often, On or ARCQ SPL?

On ships an update every 3 weeks, and ARCQ SPL every 2 days. Most recently, On was updated on October 7, 2026 and ARCQ SPL on October 8, 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.*