# DubFilter vs Comp 609

DubFilter and Comp 609 both sit at 4.7 stars, but that hides the real split: 88% of Comp 609's written reviews are positive against 73% of DubFilter's. Comp 609 also leads on iOS requirement (10.0 vs 17.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. DubFilter sells 1 one-off in-app purchase and Comp 609 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 Comp 609. Both are backed by a comparable volume of ratings — 71 and 25 respectively. Written reviews are what separate them: 73% of DubFilter's written reviews are positive against 88% of Comp 609's.

DubFilter ships an update every 6 months, Comp 609 every 7 months. The most recent releases landed on October 3, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | DubFilter | Comp 609 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (71 ratings)](https://appshunter.io/ios/app/dubfilter/id979648058/reviews) | **[4.8 (25 ratings)](https://appshunter.io/ios/app/comp-609/id1514569444/reviews)** |
| Number of ratings | **71** | 25 |
| Positive reviews | 73.3% of reviews | **87.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 12 MB | 21 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 |


### Comp 609

[App page](https://appshunter.io/ios/app/comp-609/id1514569444)

This audio effect plugin emulates analog compressors, offering extensive control over attack, release, ratio, and saturation. It supports various operation modes, external sidechaining, and parallel compression for detailed audio shaping. A demo version is available with a time limit.

**Highlights:** Analog compressor emulation, Adjustable attack, release, and ratio, External sidechain with high-pass filter, Multiple operation modes (M/S, Stereo, Mono), Parallel compression, Oversampling and 64-bit processing, Scalable GUI

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS Comp 609 Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is DubFilter free?

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

### Is Comp 609 free?

Comp 609 is free to download, with in-app purchases available.

### Which has better reviews, DubFilter or Comp 609?

Comp 609 is rated higher. DubFilter averages 4.7 out of 5 from 71 ratings, while Comp 609 averages 4.8 from 25 ratings.

### Do DubFilter or Comp 609 have ads?

Neither DubFilter nor Comp 609 shows ads.

### Which is updated more often, DubFilter or Comp 609?

DubFilter ships an update every 6 months, and Comp 609 every 7 months. Most recently, DubFilter was updated on October 3, 2026 and Comp 609 on September 30, 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.*