Comparison

Theremini Advanced Software Editor vs MidiQuesti

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

Head to head
About

Theremini Advanced Software Editor

This application allows users to deeply customize and manage sounds for their Moog Theremini hardware synthesizer. It provides tools to create new presets, edit existing ones, and organize sound libraries. Users can also access an exclusive library of new presets to enhance their creative process.

Highlights
  • Create new presets
  • Edit existing presets
  • Craft new sounds in real-time
  • Manage preset libraries
  • Share sound libraries
  • Edit global settings
Read full description

Unlock your Theremini’s previously unseen world of sonic features with The Moog Theremini Advanced Software Editor. This editor puts the power of sound design in your hands by allowing you to access new layers of the Theremini’s synthesis engine. Easily craft new and exciting sounds for your Moog Theremini, re-sculpt existing presets, and share your sonic creations with others. The Moog Theremini Advanced Software Editor also includes an exclusive library of new presets to kick-start your creative process. NOTE: This application does not make sound by itself. It is an editor librarian app for the Moog Theremini. To use this app, the user must have a Lightning to USB host adapter (for iPads with Lightning connector) or the Apple Camera Connection Kit (for iPads with 30pin connector) and a mini USB cable. FEATURES Create new presets Edit existing presets Craft new sounds in real-time while playing your Moog Theremini Create or edit preset libraries with built in Library Manager Unlimited preset storage Share libraries of sounds via email or iTunes file sharing Edit the Theremini’s global settings Built in Editor User Manual, Theremini User Manual, and Quick Start Guide Simple drag-and-drop preset library Quick Save for instantly editing an existing sound

About

MidiQuesti

This app is a comprehensive MIDI SysEx editor and librarian for managing and organizing patches, banks, and other data from a vast array of MIDI instruments. It offers advanced editing capabilities, real-time parameter control, and the ability to manage multiple devices simultaneously.

Highlights
  • Supports 900+ MIDI instruments from 50+ manufacturers
  • Store, organize, and edit banks and patches
  • Multi-instrument and multi-port support
  • Real-time parameter editing
  • Drag and drop bank editing
  • Import/export .syx and .mid files
  • Block Copy/Swap for parameter groups
Read full description

Unparalleled SysEx Management for MIDI Hardware... Midi Quest supports 900 of the most popular MIDI instruments and other devices from over 50 different manufacturers including Korg, Roland, Yamaha, Kurzweil, Alesis, Waldorf, Kawai, Akai, and E-mu.. Store, organize, and edit banks and the individual patches, combinations, multis, performances, drums settings, and other SysEx loaded from your MIDI hardware. Midi Quest is a true multi-instrument editor/librarian designed from the ground up to effectively support multiple MIDI ports, multiple manufacturers, and multiple MIDI devices. Midi Quest "talks" to each MIDI device individually so it can simultaneously send SysEx to as many as 250 different instruments and still edit another instrument - all at the same time. Try doing that with any other editor/librarian... Midi Quest is not a panel editor. Midi Quest is a professional, integrated system capable of fully managing, editing, and organizing the simplest to the most complex workstation class MIDI devices and hardware synthesizers such as Korg's flagship workstation, the Kronos. Midi Quest natively reads and writes industry standard .syx and .mid files so that you can easily take advantage of SysEx downloaded from the internet or received from a friend. Midi Quest for iPad imports Set, Collection, individual Patch, and individual Bank files from Mac and Windows versions of Midi Quest so existing SysEx can easily be stored and edited on an iPad. Midi Quest can store an entire studio configuration - in a single file. First, what every editor/librarian should have (but may not)... Midi Quest will easily handle all of your bank editing tasks. Copy and Paste, Swap, or Insert single or multiple patches within the same bank or with other banks using menu commands or drag and drop. Along with a dozen other standard commands to rename, sort, shift patches, and so on. 1-tap audition automatically sends selected patches. Midi Quest's unique and powerful bank editing capabilities are highlighted in multi-timbral instruments with parent/child linked editing and display. Just like its bank editors, Midi Quest's parameter editors cover all of the basics with the features you expect - multiple ways to edit each parameter: grab and drag editing, extended popup editing, and true rotary knob editing. Unlike most panel editors, Midi Quest can retrieve and display all of the current values of all parameters. Of course, Midi Quest performs edits in real time so the instrument immediately reflects the changes made on screen. It also offers a range of both manual and automatic auditioning options. Scale each editor to a customizable size (up to 3X) so editing is fast and easy. Along with the editor's many features, take advantage of the Block Copy/Swap options which allows for the selection of a logical group of parameters such as an envelope, oscillator, effect, or LFO and copy/swap them within the same patch, or a different patch. Midi Quest is not just for the patch tweaker. Midi Quest has many users who have never created a new patch by editing individual parameters. Their secret is Midi Quest's five different patch generators: Mix, Blend, Mix All, Morph, and Gen 4. Each takes existing sounds and combines them in different ways to create entire banks of new sounds in a matter of seconds. This type of experimentation, without Midi Quest, would require days but with Midi Quest there are results in seconds. Looking for new inspiration? Looking for a sound but no time for programming? Midi Quest has the answer for you. Sound Quest's latest patch collection contains over 180,000 unique patches and is now accessible to everyone with Midi Quest using the unique Patch Zone view. This context sensitive view tracks the instrument and type of SysEx and automatically lists the available patches. For more detailed information on Midi Quest for iPad, visit Sound Quest's web site at www.squest.com

Verdict

The call

The clearest difference is review sentiment: Theremini Advanced Software Editor at 60% against MidiQuesti's 10%. Theremini Advanced Software Editor also leads on rating (3.8 vs 1.5) and in-app purchases (none vs 10). MidiQuesti's advantage is update cadence (weekly vs every 4 months). On price, ratings volume, ads 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. MidiQuesti sells 10 one-off in-app purchases. Theremini Advanced Software Editor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Theremini Advanced Software Editor holds the better App Store score, 3.8 against 1.5. Both are backed by a comparable volume of ratings — 13 and 11 respectively. Written reviews point the same way: 60% of Theremini Advanced Software Editor's written reviews are positive against 10% of MidiQuesti's.

UpkeepUpdate frequency

Theremini Advanced Software Editor ships an update every 4 months, MidiQuesti weekly. The most recent releases landed on June 1, 2026 and June 9, 2026 respectively.

Scorecard6 real differences · 4 level
Theremini Advanced Software Editor versus MidiQuesti: the parameters behind the verdict, then further details
ParameterTheremini Advanced Software EditorMidiQuesti
PriceFreeFree
Rating3.8 (13 ratings) — better1.5 (11 ratings)
Positive reviews60.0% of reviews — better10.0% of reviews
Number of ratings13 — better11
Update frequencyEvery 4 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterPaid
DevicesiPadiPad
Requires iOS5.1.1 — better10.3
Further details — not scored
Size50 MB54 MB
Age rating4+4+
DeveloperMoog Music Inc.Sound Quest

Customer experience

Theremini Advanced Software Editor

All ratings13 ratings
Positive69.2%
Neutral7.7%
Negative23.1%
Written reviews5 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

MidiQuesti

All ratings11 ratings
Positive9.1%
Neutral0.0%
Negative90.9%
Written reviews40 reviews
Positive10.0%
Neutral5.0%
Negative85.0%

In-app purchases

None

Theremini Advanced Software Editor

No in-app purchases

10 purchases

MidiQuesti

One-time10
  • Yamaha Reface CP$35.99
  • Yamaha Reface CS$35.99
  • Yamaha Reface DX$35.99
Show 7 more
  • Yamaha Reface YC$35.99
  • Akai Pro EWI4000S$49.99
  • Korg DW-8000$49.99
  • Waldorf Blofeld$49.99
  • Waldorf Blofeld Keyboard$49.99
  • Korg M3/R$89.99
  • MQi v1 All Instrument License$249.99

Questions

Is Theremini Advanced Software Editor free?
Theremini Advanced Software Editor is free to download, with no in-app purchases.
Is MidiQuesti free?
MidiQuesti is free to download, with in-app purchases available.
Which has better reviews, Theremini Advanced Software Editor or MidiQuesti?
Theremini Advanced Software Editor is rated higher. Theremini Advanced Software Editor averages 3.8 out of 5 from 13 ratings, while MidiQuesti averages 1.5 from 11 ratings.
Do Theremini Advanced Software Editor or MidiQuesti have ads?
Neither Theremini Advanced Software Editor nor MidiQuesti shows ads.
Which is updated more often, Theremini Advanced Software Editor or MidiQuesti?
Theremini Advanced Software Editor ships an update every 4 months, and MidiQuesti weekly. Most recently, Theremini Advanced Software Editor was updated on June 1, 2026 and MidiQuesti on June 9, 2026.

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