# F vs Comp 609

The clearest difference is price: Comp 609 at Free against F's $2.99. Comp 609 also leads on review sentiment (88% vs 78%) and iOS requirement (10.0 vs 12.0). F's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.8). On ratings volume, update cadence, ads and device support there is nothing between them.

Comp 609 is free to download; F costs $2.99 up front. Comp 609 sells 1 one-off in-app purchase. F asks for nothing beyond the download.

F holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 18 and 25 respectively. Written reviews complicate that: 78% of F's written reviews are positive against 88% of Comp 609's, so the app with the better star average is not the one people write more warmly about.

F ships an update every 8 months, Comp 609 every 7 months. The most recent releases landed on September 18, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | F | Comp 609 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (18 ratings)](https://appshunter.io/ios/app/f-16-filter/id1074502761/reviews)** | [4.8 (25 ratings)](https://appshunter.io/ios/app/comp-609/id1514569444/reviews) |
| Number of ratings | 18 | **25** |
| Positive reviews | 77.8% of reviews | **87.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 7 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 21 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blamsoft, Inc.](https://appshunter.io/developer/1051938244) | [RRS, OOO](https://appshunter.io/developer/1486125568) |

## What reviewers say

### F

[App page](https://appshunter.io/ios/app/f-16-filter/id1074502761)

This audio effect plugin offers sixteen versatile filter modes with precise controls for frequency, resonance, and analog-style saturation. Visualize your frequency response in real-time for intuitive adjustments. It integrates seamlessly with popular AUv3 compatible music production apps.

**Highlights:** Sixteen filter modes, Frequency and resonance controls, Analog-style saturation, Wet/dry mix, Frequency response display, Zero Delay Feedback algorithm

**In-app purchases:** none


### 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 F free?

F costs $2.99, with no in-app purchases.

### Is Comp 609 free?

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

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

F is rated higher. F averages 5.0 out of 5 from 18 ratings, while Comp 609 averages 4.8 from 25 ratings.

### Do F or Comp 609 have ads?

Neither F nor Comp 609 shows ads.

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

F ships an update every 8 months, and Comp 609 every 7 months. Most recently, F was updated on September 18, 2026 and Comp 609 on September 12, 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.*