# Omni Sub vs OmniPDF

The clearest difference is price: OmniPDF at Free against Omni Sub's $34.99. Omni Sub's advantage is in-app purchases (none vs 3) and iOS requirement (13.0.0 vs 18.6). On update cadence, ads and device support there is nothing between them.

OmniPDF is free to download; Omni Sub costs $34.99 up front. OmniPDF sells 3 in-app purchases, starting at $3.99 per month. Omni Sub asks for nothing beyond the download.

Omni Sub ships an update every 4 weeks, OmniPDF every 6 weeks. The most recent releases landed on October 21, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Omni Sub | OmniPDF |
| --- | --- | --- |
| Price | $34.99 | **Free** |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/omni-sub/id1524175030/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 6 weeks |
| Monetization | Paid | — |
| Size | 13 MB | 17 MB |
| Requires iOS | **13.0.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [sebastian rivas](https://appshunter.io/developer/506708461) | [zhentao zhang](https://appshunter.io/developer/1858942516) |

## 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


### OmniPDF

[App page](https://appshunter.io/ios/app/omnipdf-batch-pdf-tools/id6779046820)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OmniPDF Pro Monthly | $3.99 | per month |
| OmniPDF Pro Yearly | $29.99 | per year |
| OmniPDF Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is Omni Sub free?

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

### Is OmniPDF free?

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

### Do Omni Sub or OmniPDF have ads?

Neither Omni Sub nor OmniPDF shows ads.

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

Omni Sub ships an update every 4 weeks, and OmniPDF every 6 weeks. Most recently, Omni Sub was updated on October 21, 2026 and OmniPDF on October 22, 2026.

---

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