# DubFilter vs F

The clearest difference is price: DubFilter at Free against F's $2.99. DubFilter also leads on ratings volume (71 vs 18). F's advantage is in-app purchases (none vs 1) and rating (5.0 vs 4.7). On review sentiment, update cadence, ads and device support there is nothing between them.

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

F holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 71 and 18 respectively. Written reviews point the same way: 73% of DubFilter's written reviews are positive against 78% of F's.

DubFilter ships an update every 6 months, F every 8 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | DubFilter | F |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.7 (71 ratings)](https://appshunter.io/ios/app/dubfilter/id979648058/reviews) | **[5.0 (18 ratings)](https://appshunter.io/ios/app/f-16-filter/id1074502761/reviews)** |
| Number of ratings | **71** | 18 |
| Positive reviews | 73.3% of reviews | **77.8% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 8 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 12 MB | 15 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Amazing Noises](https://appshunter.io/developer/903336421) | [Blamsoft, Inc.](https://appshunter.io/developer/1051938244) |

## 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 |


### 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


## Frequently asked questions

### Is DubFilter free?

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

### Is F free?

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

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

F is rated higher. DubFilter averages 4.7 out of 5 from 71 ratings, while F averages 5.0 from 18 ratings.

### Do DubFilter or F have ads?

Neither DubFilter nor F shows ads.

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

DubFilter ships an update every 6 months, and F every 8 months. Most recently, DubFilter was updated on October 7, 2026 and F on October 9, 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.*