# DubFilter vs EQ550b

The clearest difference is update cadence: EQ550b at every 2 weeks against DubFilter's every 6 months. EQ550b also leads on review sentiment (100% vs 73%) and iOS requirement (10.0 vs 17.0). DubFilter's advantage is ratings volume (71 vs 13). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. DubFilter sells 1 one-off in-app purchase and EQ550b sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for DubFilter against 4.8 for EQ550b. That said, the two scores are not equally well evidenced: DubFilter has 71 ratings behind it against 13, so its average is the more settled of the two. Written reviews are what separate them: 73% of DubFilter's written reviews are positive against 100% of EQ550b's.

DubFilter ships an update every 6 months, EQ550b every 2 weeks. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | DubFilter | EQ550b |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (71 ratings)](https://appshunter.io/ios/app/dubfilter/id979648058/reviews) | **[4.8 (13 ratings)](https://appshunter.io/ios/app/eq550b/id1507176549/reviews)** |
| Number of ratings | **71** | 13 |
| Positive reviews | 73.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 12 MB | 19 MB |
| Requires iOS | 17.0 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Amazing Noises](https://appshunter.io/developer/903336421) | [RRS, OOO](https://appshunter.io/developer/1486125568) |

## What reviewers say

### DubFilter

[App page](https://appshunter.io/ios/app/dubfilter/id979648058)

This app provides a powerful dual filter with resonance and an exclusive overlap parameter. It also features a redesigned stereo sample player with LFO and scrubbing, along with extensive MIDI and file management capabilities.

**Highlights:** Dual low-pass/high-pass filter, Resonance and Overlap parameter, Stereo sample player with LFO, Scrubbing capabilities, Audiobus and Inter-App Audio support, MIDI control and file management, Preset morphing pad

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Audio Unit Plugin Support | $1.99 | one-time |


### 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 |


## Frequently asked questions

### Is DubFilter free?

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

### Is EQ550b free?

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

### Which has better reviews, DubFilter or EQ550b?

EQ550b is rated higher. DubFilter averages 4.7 out of 5 from 71 ratings, while EQ550b averages 4.8 from 13 ratings.

### Do DubFilter or EQ550b have ads?

Neither DubFilter nor EQ550b shows ads.

### Which is updated more often, DubFilter or EQ550b?

DubFilter ships an update every 6 months, and EQ550b every 2 weeks. Most recently, DubFilter was updated on October 7, 2026 and EQ550b on October 1, 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.*