# Omni Sub vs On

The clearest difference is price: On at Free against Omni Sub's $34.99. On also leads on rating (5.0 vs 3.7). Omni Sub's advantage is in-app purchases (none vs 2) and iOS requirement (13.0.0 vs 17). On ratings volume, update cadence, ads and device support there is nothing between them.

On is free to download; Omni Sub costs $34.99 up front. On sells 2 one-off in-app purchases. Omni Sub asks for nothing beyond the download.

On holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 3 and 6 respectively.

Omni Sub ships an update every 4 weeks, On every 3 weeks. The most recent releases landed on September 17, 2026 and July 8, 2026 respectively.

## The numbers

| Metric | Omni Sub | On |
| --- | --- | --- |
| Price | $34.99 | **Free** |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/omni-sub/id1524175030/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/on-axis/id6446842774/reviews)** |
| Number of ratings | 3 | **6** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 3 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 13 MB | 20 MB |
| Requires iOS | **13.0.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [sebastian rivas](https://appshunter.io/developer/506708461) | [OK-Sound](https://appshunter.io/developer/1679335942) |

## What reviewers say

### Omni Sub

[App page](https://appshunter.io/ios/app/omni-sub/id1524175030)

This application is an acoustical simulation tool designed for audio engineers. It allows for the simulation of source interactions at low frequencies, including various sub array configurations.

**Highlights:** Low frequency simulation, Source interaction simulation, Cardioid sub array simulation, End-fired sub array simulation, Acoustical analysis

**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 Omni Sub free?

Omni Sub costs $34.99, with no in-app purchases.

### Is On free?

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

### Which has better reviews, Omni Sub or On?

On is rated higher. Omni Sub averages 3.7 out of 5 from 3 ratings, while On averages 5.0 from 6 ratings.

### Do Omni Sub or On have ads?

Neither Omni Sub nor On shows ads.

### Which is updated more often, Omni Sub or On?

Omni Sub ships an update every 4 weeks, and On every 3 weeks. Most recently, Omni Sub was updated on September 17, 2026 and On on July 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.*