# EQ550b vs Zen AutoPan

The clearest difference is in-app purchases: Zen AutoPan at none against EQ550b's 1. EQ550b's advantage is update cadence (every 2 weeks vs every 13 months) and review sentiment (100% vs 80%). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. EQ550b sells 1 one-off in-app purchase. Zen AutoPan asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for EQ550b against 4.7 for Zen AutoPan. Both are backed by a comparable volume of ratings — 14 and 15 respectively. Written reviews are what separate them: 100% of EQ550b's written reviews are positive against 80% of Zen AutoPan's.

EQ550b ships an update every 2 weeks, Zen AutoPan every 13 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | EQ550b | Zen AutoPan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (14 ratings)](https://appshunter.io/ios/app/eq550b/id1507176549/reviews)** | [4.7 (15 ratings)](https://appshunter.io/ios/app/zen-autopan/id6478596185/reviews) |
| Number of ratings | 14 | **15** |
| Positive reviews | **100.0% of reviews** | 80.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 13 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 15 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RRS, OOO](https://appshunter.io/developer/1486125568) | [Tom Power](https://appshunter.io/developer/1629402664) |

## What reviewers say

### EQ550b

[App page](https://appshunter.io/ios/app/eq550b/id1507176549)

This audio effect plugin emulates a classic American equalizer from the late 1960s, offering four bands of equalization with selectable frequencies and proportional Q. It provides a wide range of tonal variations for professional audio manipulation and can be used as a standalone app or an AUv3 plugin.

**Highlights:** Modeled vintage EQ, Four bands of equalization, Selectable frequency centers, Proportional Q filter, Stereo, Mid, or Side EQ modes, AUv3 plugin compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS EQ550b Unlimited | $4.99 | one-time |


### Zen AutoPan

[App page](https://appshunter.io/ios/app/zen-autopan/id6478596185)

This AUv3 stereo movement tool offers dynamic panning effects for music production and sound design. Sculpt your audio with multiple LFO shapes and an intuitive XY pad for real-time creative control. Seamlessly integrate with compatible DAWs on iOS devices.

**Highlights:** Multiple LFO Shapes, Intuitive XY Pad, Adjustable Stereo Width, AUv3 Compatibility, Optimized for iOS, 3D Visuals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EQ550b free?

EQ550b is free to download, with in-app purchases available.

### Is Zen AutoPan free?

Zen AutoPan is free to download, with no in-app purchases.

### Which has better reviews, EQ550b or Zen AutoPan?

EQ550b is rated higher. EQ550b averages 4.8 out of 5 from 14 ratings, while Zen AutoPan averages 4.7 from 15 ratings.

### Do EQ550b or Zen AutoPan have ads?

Neither EQ550b nor Zen AutoPan shows ads.

### Which is updated more often, EQ550b or Zen AutoPan?

EQ550b ships an update every 2 weeks, and Zen AutoPan every 13 months. Most recently, EQ550b was updated on October 24, 2026 and Zen AutoPan on October 21, 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.*