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.
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.
- Intuitive sound design interface
- Versatile oscillators (analog & digital)
- Audio clip recording and export
- Extensive modulation
- Wide range of effects
- MIDI support
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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
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.
- Create new presets
- Edit existing presets
- Craft new sounds in real-time
- Manage preset libraries
- Share sound libraries
- Edit global settings
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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 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
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.
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.
Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 29, 2026 and June 1, 2026 respectively.
| Parameter | Scythe Synthesizer | Theremini Advanced Software Editor |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.6 (131 ratings) — better | 3.8 (13 ratings) |
| Positive reviews | 77.3% of reviews — better | 60.0% of reviews |
| Number of ratings | 131 — better | 13 |
| Update frequency | Every 4 months | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPad | iPad |
| Requires iOS | 26.0 | 5.1.1 — better |
| Further details — not scored | ||
| Size | 9 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Miles Egan | Moog Music Inc. |
Customer experience
Scythe Synthesizer
Theremini Advanced Software Editor
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
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- 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
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- 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
Scythe Synthesizer
No in-app purchases
Theremini Advanced Software Editor
No in-app purchases
Questions
Is Scythe Synthesizer free?
Is Theremini Advanced Software Editor free?
Which has better reviews, Scythe Synthesizer or Theremini Advanced Software Editor?
Do Scythe Synthesizer or Theremini Advanced Software Editor have ads?
Which is updated more often, Scythe Synthesizer or Theremini Advanced Software Editor?
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