Comparison

MsyChords vs GSDSP MMMm

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

Head to head
About

MsyChords

Create custom chord tables with precise tone control, including loudness, sustain, inversions, and arpeggios. Select from iCloud or transpose to any key. Offers five presets and intuitive performance controls for a personalized musical experience.

Highlights
  • Custom chord table creation
  • Adjustable loudness and sustain
  • Chord inversions and arpeggios
  • Preset performance controls
  • Transpose to any key
  • iCloud chord table selection
Features
Read full description

The MsyChords app let you create a table with chords with exactly the tones you like to hear. You can control the performance with loudness, sustain, chord inversions and arpeggios. The chord tables also can be selected from the iCloud directory. The tables can be transposed to the wanted key. Performance control Five presets, four buttons and two sliders allow to control the play performance. - Presets -- Five presets can be changed with one finger tip. The preset is configured by touching the white circle on the selector plane. A chord table is selected from a directory, the tone base (key) is set and a the sound can be chosen from a sound font. - Level control -- The sliders allow to adjust the volume at any time while playing. The slider on the left side and on the right side are synchronized and have the exact identical effect. - Play mode & arpeggiator -- The left top button allows to select different play modes by tapping or sliding the button. Mode 1 plays the chords exactly as they are denoted. Mode 2 supports to play inversions of the chord. Mode 3 to mode 7 provide different arpeggio patterns. - Speed control & help -- The right top button has two functions. For play mode 1 and 2, the button provides a help and settings page. In play mode 3 to mode 7, the button allows to control the speed of the arpeggios. The speed can be set by tapping or by sliding the button. - Sustain control -- The left bottom button provides a kind of a damper pedal. If pressed, the played chords continue to sound until the button is released. - Lock sustain and clear -- The right bottom button provides a lock sustain mode. The touched chord continues to sound until a next chord is played. The mode is enabled by pressing the right bottom button while the left bottom button is pressed. Chord tables A chord table is a collection of chords organized in rows and columns. The chord consists of arbitrary tones and a chord name chord. Further the table has an entry for a base tone (key). - Chord tones -- The tones are denoted as duodecimal MIDI numbers. Thereby we have two numbers for one tone. The first number is the octave, the second number is the semitone within the octave. As there are twelve semitones in an octave, the tone A#/Bb is denoted as 'X' and B is denoted as 'T'. ```|0:C|1:C#,Db|2:D| 3:D#,Eb|4:E|5:F|6:F#,Gb|7:G|8:G#,Ab|9:A|x:A#,Bb|t:B|``` - Chord name -- The name of the chords can be chosen arbitrary. But when the first letter is one of ABCDEFG, the letter is used to determine the musical function step in relation to the base tone. In that case the second letter is analyzed in addition if it is a # or b. Also transposing of the chord names is supported then. - Chord table selection -- The selection panel shows files of the MsyChords directory in alphabetical order. New chord tables can be created, renamed and deleted. Editing chord tables The edit mode is started by long pressing the preset selector button the selector button changes to red. - Editing chord tones -- Editing the chord tones is done with a dedicated keyboard showing the numbers 0 .. 9,X,T. - Editing chord names -- Editing the chord names is done with a keyboard providing text symbols supporting arbitrary text. - Add or delete rows or columns -- In edit mode rows and columns can be added or deleted by clicking on '⌑'. Also the position of the chord table button can be changed. - Move cell -- Chord table cells can be moved to other positions by touching '=' and moving the cell. - Save -- If a new table is loaded and the current table was modified, the user is asked to save the table or to ignore the changes. Saving is supported in the full version. - iCloud directory -- Chord tables a can be imported and exported via the MsyChords iCloud directory. Sound font files One sound font with 10 sounds is in-build (from FluidR3_GM.sf2 from Frank Wen). Other arbitrary .sf2 sound font files can be loaded via the MsyChords iCloud directory.

About

GSDSP MMMm

This app provides a powerful MIDI modulation engine to control various plugins, hardware, and instruments. It offers a range of modulation sources like LFOs and random generators, and includes a dedicated performance skin for live use. It's a MIDI-only FX version for hosts requiring pure MIDI processing.

Highlights
  • MIDI CC control for plugins and hardware
  • LFO, Random, Envelope Follower modulators
  • XY pads for modulation
  • Dedicated Performance Skin for live use
  • AUv3 MIDI FX plugin
  • Desktop versions available
Features
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A powerful MIDI modulation engine for controlling plugins, hardware, and instruments using LFOs, random sources, macros, and audio-based modulation. Modulate Everything MMMm is a MIDI controller and modulation workstation designed to control any parameter that accepts MIDI CC — software instruments, plugins, external hardware, or any MIDI-capable device. Create modulation using LFOs, Random Generators, Envelope Followers, XY pads, and more. No more drawing of automation curves, keep your audio dynamic and exciting with ease. Perform Live MMMm includes a dedicated Performance Skin designed for low-light and stage environments. It uses a restrained, red-accented color palette that preserves focus and minimizes visual distraction while performing. The interface remains clear and readable in dark settings, ensuring stable workflow during your live performance. MMM vs MMMm MMM includes audio input, enabling Envelope Followers, audio-reactive modulation, and audio output — ideal when used as an audio plugin. MMMm, by contrast, is a MIDI-only FX version for hosts such as Logic Pro or AUM that require a pure MIDI processor. Both versions support MIDI input and output and provide the same core modulators. MMMm is an AUv3 midi effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products

Screenshots

MsyChords4 screens
GSDSP MMMm4 screens

Verdict

The call

The clearest difference is rating: GSDSP MMMm at 4.9 against MsyChords's 4.0. GSDSP MMMm also leads on in-app purchases (none vs 1) and update cadence (every 5 weeks vs every 11 months). On price, ads, monetization model and device support 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

Both are free to download. MsyChords sells 1 one-off in-app purchase. GSDSP MMMm asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GSDSP MMMm holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: GSDSP MMMm has 16 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 75% of MsyChords's written reviews are positive against 100% of GSDSP MMMm's.

UpkeepUpdate frequency

MsyChords ships an update every 11 months, GSDSP MMMm every 5 weeks. The most recent releases landed on October 4, 2026 and October 20, 2026 respectively.

Scorecard6 real differences · 4 level
MsyChords versus GSDSP MMMm: the parameters behind the verdict, then further details
ParameterMsyChordsGSDSP MMMm
PriceFreeFree
Rating4.0 (3 ratings)4.9 (16 ratings) — better
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings316 — better
Update frequencyEvery 11 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.212.0 — better
Further details — not scored
Size39 MB44 MB
Age rating4+4+
DeveloperBernhard FeitenGustav Scholda

Customer experience

MsyChords

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

GSDSP MMMm

All ratings16 ratings
Positive93.8%
Neutral6.3%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

MsyChords

One-time1
  • MsyChords-StoreFeature$7.99
None

GSDSP MMMm

No in-app purchases

Questions

Is MsyChords free?
MsyChords is free to download, with in-app purchases available.
Is GSDSP MMMm free?
GSDSP MMMm is free to download, with no in-app purchases.
Which has better reviews, MsyChords or GSDSP MMMm?
GSDSP MMMm is rated higher. MsyChords averages 4.0 out of 5 from 3 ratings, while GSDSP MMMm averages 4.9 from 16 ratings.
Do MsyChords or GSDSP MMMm have ads?
Neither MsyChords nor GSDSP MMMm shows ads.
Which is updated more often, MsyChords or GSDSP MMMm?
MsyChords ships an update every 11 months, and GSDSP MMMm every 5 weeks. Most recently, MsyChords was updated on October 4, 2026 and GSDSP MMMm on October 20, 2026.

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