Comparison

Motion Synth vs RRS Ivoks

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

Head to head
About

Motion Synth

This app turns your iPhone or iPod touch into a musical instrument. Play notes with touch and control sound with motion. It can be used standalone, with other iOS music apps, or even external hardware and laptop software.

Highlights
  • Play notes via touch
  • Shape sound through motion
  • Control in-app sounds
  • Control other iOS music apps
  • Control external hardware synths
  • Control laptop audio/visual software
Features
Read full description

Music through motion: The AUUG Motion Synth transforms your iPhone or iPod touch into an expressive musical instrument that lets you play notes via touch and shape their sound through motion. Visit http://www.auug.com to see a demonstration video. Available here is the free version of the AUUG Motion Synth App, designed to allow users to easily experience motion-based music creation. Follow the in-app video tutorial to learn how to play the musical instrument sounds included with the app (See 'SETUP VIDEO' button). An upgraded version of the app is also available, and has been carefully designed to work with the AUUG Motion Synth Grip. Together, the Motion Synth App and Grip transform your iPhone or iPod touch into a practical and powerful musical instrument. Get yours here: http://www.auug.com/order/ ------ Play in-app sounds, iOS music apps (e.g. GarageBand), or laptop software through movement: The AUUG Motion Synth tracks your movements and screen touches to expressively play in-app musical sounds. The AUUG Motion Synth also allows you to play the sounds of other iOS music apps, giving you access to a vast array of sounds and effects. You can also play external devices like hardware synths or vocal harmonizers as well as control audio or visual software on a laptop (via WiFi or cabled connections). The Motion Synth app is also compatible with the Music IO app, allowing you to control your laptop software via your iPhone cable (Lightning). ------ Use the Motion Synth App by itself or with a Motion Synth Grip: The Motion Synth App has two modes: 1) Single-Key mode (free version): This Motion Synth App mode allows you to quickly engage with motion-based music control, and includes tutorial videos explaining how to use the in-app sounds. 2) Multi-Key mode (upgrade): This Motion Synth App mode is designed to work with the AUUG Motion Synth Grip: a physical holder that securely attaches your iPhone or iPod touch to your hand, thereby improving the dexterity and accuracy with which you can trigger notes via the touch screen.

About

RRS Ivoks

This app emulates analog synthesizers, offering a range of sound shaping tools including oscillators, filters, and amplifiers. It supports AUv3 hosting for integration with music production apps and provides extensive MIDI control.

Highlights
  • Analog Emulation
  • AUv3 Compatible
  • Dual Oscillators
  • Filter Block with ADSR
  • Amplifier Block with ADSR
  • Modulation (LFO) Controls
  • MIDI CC Implementation
Read full description

RRS Ivoks AUv3 instrument — comes as time-limited Demo-version for you to try. It gives you 5 minutes of Free play time. (You can reload the RRS Ivoks AUv3 instrument as many times as you want, thereby you get the Demo period again and again.) Unlimited version of RRS Ivoks AUv3 instrument comes as In-App Purchase. Features: • Analog Emulation; • Undo/Redo; • A/B comparison; • 2x/4x/8x Upsampling; • Macro controllers; • Scalable GUI. On the centre panel are located two audio-frequency oscillators: • OSC1 offers frequency Band regulator, five Waveforms and controls for LFO Modulation level plus OSC2 Cross-modulation; • OSC2 offers the same frequency Band and Waveforms, an independent control for Modulation depth, plus Detuning. Underneath these located the mixer, which offers level controls for the two Oscillators, the Noise generator, and Saturation Drive. To the right of these, located the filter block. The top half is a standard ADSR envelope — until you flip the switch «Envelope mode», when it becomes a repeating AD-envelope instead. The four controls at the bottom adjust Cut-off, Resonance, LPF to BPF switch, Modulation level and Envelope level. Next after the filter is the amplifier block, it also has ADSR envelope along with another Modulation level and Velocity sensitivity control. Again, the envelope can be switched to a Repeating Mode that generates a triangular waveform determined by the Attack and Decay settings, providing some of the instrument’s most distinctive effects. The leftmost panels house the Modulation (LFO) controls (top), Mode which offers four waveforms, including noise, and a stepped Function for sample & hold (S&H) effects, well as Speed control. And global settings such as the master Tune, master Volume, Legato mode, Monophonic and Duophonic operation and Unison switches, and the Glide control. To use Ivoks as an instrument, you need an AUv3-compatible host app like GarageBand, Auria, AUM, Cubasis and more — RRS Ivoks will appear in the list of Audio Unit instruments in the host app. MIDI CC Implementation Chart: • CC#003 => HQ • CC#009 => Saturation Drive • CC#014 => Modulator Speed • CC#015 => Modulator Mode • CC#020 => Filter Attack • CC#021 => AMP Attack • CC#022 => Filter Decay • CC#023 => AMP Decay • CC#024 => Filter Sustain • CC#025 => AMP Sustain • CC#026 => Filter Release • CC#027 => AMP Release • CC#028 => Filter Envelope Mode • CC#029 => AMP Envelope Mode • CC#030 => OSC1 Band • CC#031 => OSC2 Band • CC#085 => OSC1 Waveform • CC#086 => OSC2 Waveform • CC#087 => OSC1 XMod • CC#089 => OSC2 Detune • CC#090 => MOD to OSC1 • CC#102 => MOD to OSC2 • CC#103 => OSC1 Level • CC#104 => OSC2 Level • CC#105 => Noise Generator • CC#106 => Global Tune • CC#107 => Global Glide • CC#108 => Global Volume • CC#109 => Global Voice • CC#110 => Global Unison • CC#111 => Global Retrig • CC#112 => Filter Cut-off • CC#113 => Filter Resonance • CC#114 => Filter Mode • CC#115 => MOD to Filter • CC#116 => Filter Envelope • CC#117 => MOD to AMP • CC#118 => Velocity Sensitvity

Screenshots

Motion Synth4 screens
RRS Ivoks4 screens

Verdict

The call

The clearest difference is rating: RRS Ivoks at 4.4 against Motion Synth's 3.5. RRS Ivoks also leads on update cadence (fortnightly vs every 4 months). Motion Synth's advantage is in-app purchases (none vs 1) and review sentiment (73% vs 63%). 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. RRS Ivoks sells 1 one-off in-app purchase. Motion Synth asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RRS Ivoks holds the better App Store score, 4.4 against 3.5. Both are backed by a comparable volume of ratings — 40 and 46 respectively. Written reviews complicate that: 73% of Motion Synth's written reviews are positive against 63% of RRS Ivoks's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Motion Synth ships an update every 4 months, RRS Ivoks fortnightly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
Motion Synth versus RRS Ivoks: the parameters behind the verdict, then further details
ParameterMotion SynthRRS Ivoks
PriceFreeFree
Rating3.5 (40 ratings)4.4 (46 ratings) — better
Positive reviews73.3% of reviews — better63.3% of reviews
Number of ratings4046 — better
Update frequencyEvery 4 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better10.0
Further details — not scored
Size48 MB19 MB
Age rating4+4+
DeveloperAUUGRRS, OOO

Customer experience

Motion Synth

All ratings40 ratings
Positive60.0%
Neutral5.0%
Negative35.0%
Written reviews30 reviews
Positive73.3%
Neutral0.0%
Negative26.7%

RRS Ivoks

All ratings45 ratings
Positive82.2%
Neutral4.4%
Negative13.3%
Written reviews30 reviews
Positive63.3%
Neutral3.3%
Negative33.3%

In-app purchases

None

Motion Synth

No in-app purchases

1 purchases

RRS Ivoks

One-time1
  • RRS Ivoks Unlimited$8.99

Questions

Is Motion Synth free?
Motion Synth is free to download, with no in-app purchases.
Is RRS Ivoks free?
RRS Ivoks is free to download, with in-app purchases available.
Which has better reviews, Motion Synth or RRS Ivoks?
RRS Ivoks is rated higher. Motion Synth averages 3.5 out of 5 from 40 ratings, while RRS Ivoks averages 4.4 from 46 ratings.
Do Motion Synth or RRS Ivoks have ads?
Neither Motion Synth nor RRS Ivoks shows ads.
Which is updated more often, Motion Synth or RRS Ivoks?
Motion Synth ships an update every 4 months, and RRS Ivoks fortnightly. Most recently, Motion Synth was updated on November 1, 2026 and RRS Ivoks on November 3, 2026.

Other comparisons