Comparison

FD vs MF

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

FD

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
Read full description

FD-1 is a Semi-Modular Effect Plugin including dedicated Filter, Delay and Modulation sections. At it's core, FD-1 is designed to create filter rythms and grooves by first sending the signal through a modulated filter section before feeding it to a delay stage but it goes much further than that. Built-in Step Sequencer and Low Frequency Oscillator serve as modulation sources and are ideal for creating rythmic filter sequences either free running or tempo-synced to a host application. However, due it's semi modular nature, not just filter cutoff but every control within FD-1 can be a modulation target allowing for an increased range effects and combinations ranging from Chorus and Flanger type effects over Analog and Tape Style echos to complex Stutter and Repeat effects. Overview: - VA Multi Mode Filter with 2 & 4 Pole options - Digital Stereo Delay with Tempo Sync and Time Range Control - Analog Style Step Sequencer - Low Frequency Oscillator - Easy to use Mod Matrix - Input Low-Cut and Drive Controls - Individual Return Levels for Filter and Delay Connectivity: - Standalone - AUv3 - IAA - AudioBus (Filter) MIDI: - Tempo Sync - CC Control Requirements: - iOS9+ - iPad 4th generation or newer

About

MF

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
Read full description

The MF-101S Lowpass Filter is a re-invention of Moog Music’s classic Moogerfooger MF-101 analog effects pedal. The hardware MF-101 Lowpass Filter, introduced in 1998, contained two complete modular functions: a classic, all-analog 4-pole Lowpass Filter paired with an envelope follower to impart dynamic motion to the filtered sound. Designed by Bob Moog and his engineering team, the MF-101 was a direct descendant of the original Moog modular synthesizers, adapted to process, modulate, and play with inputs ranging from guitar, voice, and synthesizer to any imaginable audio source. The MF-101 Lowpass Filter has been meticulously recreated as the MF-101S, capturing not only the warm and vibrant sound of the original, but also the organic way in which the parameters interact to create a musical playing experience. The MF-101S is an AUv3 effects plug-in that requires a compatible host or DAW to function.

Screenshots

FD4 screens
MF3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard5 real differences · 5 level
FD versus MF: the parameters behind the verdict, then further details
ParameterFDMF
Price$9.99 — better$14.99
Rating4.6 (32 ratings) — better4.5 (8 ratings)
Positive reviews66.7% of reviews — better50.0% of reviews
Number of ratings32 — better8
Update frequencyEvery 4 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better11.0
Further details — not scored
Size61 MB47 MB
Age rating4+4+
DeveloperKai ArasMoog Music Inc.

Customer experience

FD

All ratings32 ratings
Positive90.6%
Neutral0.0%
Negative9.4%
Written reviews9 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

MF

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

FD

No in-app purchases

None

MF

No in-app purchases

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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