# Sub Align

> Audio system alignment calculator for phase difference, SPL, and venue properties. (iPhone/iPad app by Pavel Smokotnin.)

- Source: https://appshunter.io/ios/app/sub-align/id1592370318 (this page in markdown: same URL + `.md`)
- Developer: [Pavel Smokotnin](https://appshunter.io/developer/1552933261)
- Category: Music, Utilities, Music
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 12.0 · 23 MB
- Released: 2021-11-25
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/sub-align/id1592370318/reviews.md

## What is Sub Align?

Set the positions of the mains and subwoofer, size of the venue, environment properties and needed alignment.

Application calculates:
- phase difference at the audience from the beginning to the end of the venue
- SPL at the audience from the beginning to the end of the venue
- SPL Plane
- SPL Section
- Relative level Plane
- Relative level Section

Implementation of the original Merlijn van Veen calculator.

## Key features

- Calculate phase difference
- Calculate SPL
- SPL Plane visualization
- SPL Section visualization
- Relative level visualization
- Venue and environment property input


## Frequently asked questions about Sub Align

### What does Sub Align calculate?

Sub Align calculates phase difference and SPL at the audience from the beginning to the end of a venue. It also generates visualizations for SPL Plane, SPL Section, and Relative Level Plane/Section.

### What information do I need to use Sub Align?

You need to input the positions of mains and subwoofer, the size of the venue, and environment properties to get the needed alignment calculations.

### Is Sub Align available on Android devices?

Currently, Sub Align is only supported on iPad devices. There is no information available regarding Android support at this time.

### How often is Sub Align updated?

Sub Align was last updated on November 25, 2021, with version 1.0. There is no information on the frequency of future updates.

### What is the age rating for Sub Align?

Sub Align has an age rating of 4+, making it suitable for a wide range of users.

### Does Sub Align have ads?

No, Sub Align does not contain advertisements. It is a completely ad-free application.

### What is the user feedback on Sub Align?

Sub Align has received a perfect rating of 5.0 stars from one review, indicating very positive initial user sentiment.

### Is Sub Align based on any specific tools?

Yes, the implementation of Sub Align is based on the original calculator developed by Merlijn van Veen.

## Version history (last 1 release)

### 1.0 — 2021-11-25

No release notes.

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## More apps by Pavel Smokotnin

- [Open Sound Meter](https://appshunter.io/ios/app/open-sound-meter/id1552933259)

All apps by Pavel Smokotnin: https://appshunter.io/developer/1552933261

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*