Comparison

Scythe Synthesizer vs Theremini Advanced Software Editor

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

Head to head
About

Scythe Synthesizer

Design new sounds with an intuitive interface on your iPad. This synthesizer offers a wide range of sonic possibilities, from classic analog tones to unique digital effects. Record and export your creations easily.

Highlights
  • Intuitive sound design interface
  • Versatile oscillators (analog & digital)
  • Audio clip recording and export
  • Extensive modulation
  • Wide range of effects
  • MIDI support
Features
Read full description

Scythe is a MIDI synthesizer for iPad and Mac built for fast, hands-on sound design. Shape analog and digital waveforms, explore deep modulation, save custom presets, and record and share clips without leaving the app. Scythe makes it easy to move from happy accidents to playable sounds fast. Features: • Fast, tactile sound design with the bend workflow • Analog and digital waveforms • Deep modulation and filter shaping • Delay, chorus, phaser, and bitcrusher effects • Factory presets plus your own saved presets • Record, copy, trim, and share audio clips • Core MIDI support as both controller and sound module • Designed for iPad, also available on Mac

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

Verdict

The call

The clearest difference is price: Theremini Advanced Software Editor at Free against Scythe Synthesizer's $4.99. Theremini Advanced Software Editor also leads on iOS requirement (5.1.1 vs 26.0). Scythe Synthesizer's advantage is rating (4.6 vs 3.8) and review sentiment (77% vs 60%). On update cadence, ads, in-app purchases 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

Theremini Advanced Software Editor is free to download; Scythe Synthesizer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Scythe Synthesizer holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: Scythe Synthesizer has 131 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 77% of Scythe Synthesizer's written reviews are positive against 60% of Theremini Advanced Software Editor's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 29, 2026 and June 1, 2026 respectively.

Scorecard6 real differences · 4 level
Scythe Synthesizer versus Theremini Advanced Software Editor: the parameters behind the verdict, then further details
ParameterScythe SynthesizerTheremini Advanced Software Editor
Price$4.99Free — better
Rating4.6 (131 ratings) — better3.8 (13 ratings)
Positive reviews77.3% of reviews — better60.0% of reviews
Number of ratings131 — better13
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPadiPad
Requires iOS26.05.1.1 — better
Further details — not scored
Size9 MB50 MB
Age rating4+4+
DeveloperMiles EganMoog Music Inc.

Customer experience

Scythe Synthesizer

All ratings131 ratings
Positive88.5%
Neutral6.9%
Negative4.6%
Written reviews44 reviews
Positive77.3%
Neutral13.6%
Negative9.1%

Theremini Advanced Software Editor

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

Bugs and requests

Scythe Synthesizer

Reported bugs

11 issues
  • Doesn't load AUM after update, crashes
  • Crackle on iPad Pro
  • Unintended distortion, glitched artifacts on iPad Pro
  • Confirming distortion on every patch on iPad Pro 11 inch
  • Bad digital distortion on iPad Pro 11 inch
Show 6 more
  • Weird delay on lower portion of keyboard keys
  • Triggered keyboard sizing while playing with multiple fingers
  • Presets don't save half the time
  • Preset sounds nothing like when working on it
  • Stopped sound output, dies permanently after switching apps
  • Certain patches distort quite a bit after update

Requested features

14 requests
  • Ability to choose MIDI channel
  • Controllable randomization range
  • More presets
  • Bend modulation to loop
  • Bend to be tempo synced
Show 9 more
  • Randomize effects section
  • Backward compatibility with older iOS
  • Ability to rename/save presets with custom names
  • Key/note hold feature
  • CoreMIDI support (historically)
  • Preset sharing
  • Continuum (scale) controller
  • Bend feature to loop back into itself
  • Bends to be voiced for each new key stroke

Theremini Advanced Software Editor

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Scythe Synthesizer

No in-app purchases

None

Theremini Advanced Software Editor

No in-app purchases

Questions

Is Scythe Synthesizer free?
Scythe Synthesizer costs $4.99, with no in-app purchases.
Is Theremini Advanced Software Editor free?
Theremini Advanced Software Editor is free to download, with no in-app purchases.
Which has better reviews, Scythe Synthesizer or Theremini Advanced Software Editor?
Scythe Synthesizer is rated higher. Scythe Synthesizer averages 4.6 out of 5 from 131 ratings, while Theremini Advanced Software Editor averages 3.8 from 13 ratings.
Do Scythe Synthesizer or Theremini Advanced Software Editor have ads?
Neither Scythe Synthesizer nor Theremini Advanced Software Editor shows ads.
Which is updated more often, Scythe Synthesizer or Theremini Advanced Software Editor?
Scythe Synthesizer ships an update every 4 months, and Theremini Advanced Software Editor every 4 months. Most recently, Scythe Synthesizer was updated on September 29, 2026 and Theremini Advanced Software Editor on June 1, 2026.

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