Comparison

Discord4 vs MF

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

Head to head
About

Discord4

This stereo pitch-shifting delay app offers three distinct algorithms for vintage, clean, or experimental granular effects. It features tempo-synced delays, a reverb in the feedback loop, and flexible LFO modulation for extensive sound design. Control pitch shifts with MIDI and fine-tune effects with buffer size adjustments.

Highlights
  • Three pitch-shifting algorithms (Vintage, Clean, Granular)
  • Tempo-synced and free-running delays
  • Reverb in feedback loop for shimmer effects
  • Flexible LFO modulation
  • MIDI note control for pitch shifting
  • True stereo operation with panorama controls
  • Resizable vector-based GUI
Features
Read full description

Discord4 is the Audio Damage stereo pitch shifter, in its fourth generation. Each channel has its own pitch shifter, delay, bandpass filter, and feedback, and every repeat runs back through the shifter, so the same effect can double a vocal, stack fifths into an arpeggio, or send echoes spiraling up or down. Three engines set the character. Vintage is modeled on the H910 and H949 and has their grainy, glitchy character. Modern is cleaner and more transparent. Both have a buffer control from 32 to 2048 samples that changes the character of the shift. Granular cuts the signal into grains from 15 to 100 ms long, with an interval control and a Chaos knob that scrambles them, for anything from soft clouds to complete destruction. Detune the two sides a few cents in opposite directions over a short delay for a wide doubler. Set one side a fifth up, sync the delays, and raise the feedback so each repeat climbs another step. Keep the reverb in the loop for shimmer, then hit Freeze to hold a pad under the part. Turn on MIDI Shift to play harmonies from a keyboard, or ride the pitch wheel for bends. • Three pitch-shift engines: Vintage, Modern, and Granular • True stereo: each side has its own shifter, delay, filter, feedback, and pan, or link them so the right follows the left • Up to three octaves up or down, set by the cent or locked to semitones • Delays up to two seconds per side, free-running or tempo-synced, with feedback and cross-feedback • A bandpass filter in each feedback path, set from an XY pad • A stereo reverb inside the loop, with Freeze to hold the tail indefinitely • Saturation in the loop to keep runaway feedback in check • Two flexible LFOs for pitch, delay time, and filter frequency, shaped by Wave, Skew, and Warp, free from 0.01 to 14 Hz or synced to tempo • MIDI Shift: play the shift amount from a keyboard, with pitch bend, in hosts that send MIDI to effects • A preset browser with folders and favorites, and 50 factory presets from everyday doubling to the thoroughly strange Discord4 runs as an AUv3 plugin inside any compatible iOS host, including AUM, Cubasis, Drambo, and apeMatrix, and as a standalone app with background audio for live input. It is also available for macOS, Windows, and Linux as a desktop plugin. Requires iOS 16 or later. An AUv3 host app is recommended. No subscriptions. No accounts. No nonsense. Buy it once, own it forever.

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
Currently charting
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

Discord42 screens
MF3 screens

Verdict

The call

The clearest difference is update cadence: MF at monthly against Discord4's every 14 months. MF also leads on chart position (#173 vs unranked) and iOS requirement (11.0 vs 16.0). Discord4's advantage is price ($8.99 vs $14.99) and review sentiment (61% vs 50%). 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

Discord4 costs $8.99 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 — 4.7 for Discord4 against 4.6 for MF. Both are backed by a comparable volume of ratings — 29 and 9 respectively. Written reviews are what separate them: 61% of Discord4's written reviews are positive against 50% of MF's.

UpkeepUpdate frequency

Discord4 ships an update every 14 months, MF monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 5 level
Discord4 versus MF: the parameters behind the verdict, then further details
ParameterDiscord4MF
Price$8.99 — better$14.99
Rating4.7 (29 ratings) — better4.6 (9 ratings)
Positive reviews61.1% of reviews — better50.0% of reviews
Number of ratings29 — better9
Update frequencyEvery 14 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank—#173 — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.011.0 — better
Further details — not scored
Size29 MB47 MB
Age rating4+4+
DeveloperAudio Damage, Inc.Moog Music Inc.

Customer experience

Discord4

All ratings29 ratings
Positive93.1%
Neutral0.0%
Negative6.9%
Written reviews18 reviews
Positive61.1%
Neutral11.1%
Negative27.8%

MF

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

In-app purchases

None

Discord4

No in-app purchases

None

MF

No in-app purchases

Questions

Is Discord4 free?
Discord4 costs $8.99, with no in-app purchases.
Is MF free?
MF costs $14.99, with no in-app purchases.
Which has better reviews, Discord4 or MF?
Discord4 is rated higher. Discord4 averages 4.7 out of 5 from 29 ratings, while MF averages 4.6 from 9 ratings.
Do Discord4 or MF have ads?
Neither Discord4 nor MF shows ads.
Which is updated more often, Discord4 or MF?
Discord4 ships an update every 14 months, and MF monthly. Most recently, Discord4 was updated on November 2, 2026 and MF on November 3, 2026.

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