# F vs EQ550

The clearest difference is price: EQ550 at Free against F's $2.99. EQ550 also leads on update cadence (monthly vs every 8 months) and iOS requirement (10.0 vs 12.0). F's advantage is review sentiment (78% vs 33%) and rating (5.0 vs 4.5). On ratings volume, ads and device support there is nothing between them.

EQ550 is free to download; F costs $2.99 up front. EQ550 sells 1 one-off in-app purchase. F asks for nothing beyond the download.

F holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 18 and 11 respectively. Written reviews point the same way: 78% of F's written reviews are positive against 33% of EQ550's.

F ships an update every 8 months, EQ550 monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | F | EQ550 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (18 ratings)](https://appshunter.io/ios/app/f-16-filter/id1074502761/reviews)** | [4.5 (11 ratings)](https://appshunter.io/ios/app/eq550/id1507132030/reviews) |
| Number of ratings | **18** | 11 |
| Positive reviews | **77.8% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 20 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


### EQ550

[App page](https://appshunter.io/ios/app/eq550/id1507132030)

This audio effect plugin emulates classic American EQs from the late 1960s, offering precise control over equalization with unique Proportional Q technology. It functions as a standalone app or an AUv3 plugin for compatible hosts, providing a flexible and characterful sound shaping experience.

**Highlights:** Standalone and AUv3 plugin, 3 bands of classic American equalization, Proportional Q filter bandwidth, Stereo, Mid, or Side EQ modes, Undo/Redo and A/B comparison, Scalable GUI

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS EQ550 Unlimited | $4.99 | one-time |


## Frequently asked questions

### Is F free?

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

### Is EQ550 free?

EQ550 is free to download, with in-app purchases available.

### Which has better reviews, F or EQ550?

F is rated higher. F averages 5.0 out of 5 from 18 ratings, while EQ550 averages 4.5 from 11 ratings.

### Do F or EQ550 have ads?

Neither F nor EQ550 shows ads.

### Which is updated more often, F or EQ550?

F ships an update every 8 months, and EQ550 monthly. Most recently, F was updated on October 24, 2026 and EQ550 on October 24, 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.*