# FD vs MF

The clearest difference is price: FD at $9.99 against MF's $14.99. FD also leads on review sentiment (67% vs 50%) and ratings volume (32 vs 8). MF's advantage is update cadence (monthly vs every 4 months). On rating, ads, in-app purchases and monetization model there is nothing between them.

FD costs $9.99 and MF $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.6 for FD against 4.5 for MF. Both are backed by a comparable volume of ratings — 32 and 8 respectively. Written reviews are what separate them: 67% of FD's written reviews are positive against 50% of MF's.

FD ships an update every 4 months, MF monthly. The most recent releases landed on September 12, 2026 and August 12, 2026 respectively.

## The numbers

| Metric | FD | MF |
| --- | --- | --- |
| Price | **$9.99** | $14.99 |
| Rating | **[4.6 (32 ratings)](https://appshunter.io/ios/app/fd-1-filter-delay/id1448696965/reviews)** | [4.5 (8 ratings)](https://appshunter.io/ios/app/mf-101s-lowpass-filter/id6449946747/reviews) |
| Number of ratings | **32** | 8 |
| Positive reviews | **66.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Paid | Paid |
| Size | 61 MB | 47 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kai Aras](https://appshunter.io/developer/370820899) | [Moog Music Inc.](https://appshunter.io/developer/396776421) |

## What reviewers say

### FD

[App page](https://appshunter.io/ios/app/fd-1-filter-delay/id1448696965)

This app is a semi-modular audio effect plugin featuring dedicated filter, delay, and modulation sections. It allows for the creation of rhythmic filter sequences and a wide range of complex audio effects through its flexible modulation matrix.

**Highlights:** Semi-modular effect plugin, Modulated filter section, Delay stage, Step sequencer, Low Frequency Oscillator, Mod matrix, Tempo sync

**Features:** Vision Pro support

**In-app purchases:** none


### MF

[App page](https://appshunter.io/ios/app/mf-101s-lowpass-filter/id6449946747)

This app is a digital recreation of a classic analog lowpass filter effect pedal. It allows users to add dynamic motion and warm, vibrant tones to various audio sources like guitars, vocals, and synthesizers.

**Highlights:** Analog 4-pole lowpass filter emulation, Envelope follower for dynamic motion, Processes guitar, voice, and synths, AUv3 effects plugin, Warm and vibrant sound quality

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is FD free?

FD costs $9.99, with no in-app purchases.

### Is MF free?

MF costs $14.99, with no in-app purchases.

### Which has better reviews, FD or MF?

FD is rated higher. FD averages 4.6 out of 5 from 32 ratings, while MF averages 4.5 from 8 ratings.

### Do FD or MF have ads?

Neither FD nor MF shows ads.

### Which is updated more often, FD or MF?

FD ships an update every 4 months, and MF monthly. Most recently, FD was updated on September 12, 2026 and MF on August 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.*