Comparison

Quantiloop Pro vs Roxsyn Guitar Synthesizer

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

Head to head
About

Quantiloop Pro

This app offers a powerful 4-track live looping experience for musicians. It allows for hands-free control, extensive MIDI integration, and a variety of audio effects to enhance live performances. Create complex layered performances with ease.

Highlights
  • 4-track looping with unlimited overdubs
  • Hands-free and MIDI foot controller support
  • Built-in rhythm guide and metronome
  • Up to 3 simultaneous input and track effects
  • Ableton Link and MIDI clock synchronization
  • Multiple quantize and stop modes
  • Undo/Redo functionality
Features
Currently charting
Read full description

Built for Live performance and hands free use, Quantiloop recreates the simplicity of a hardware loop pedal in an iOS app. Attach a MIDI foot controller and control it the way you want. No MIDI controller at hand; just preset your loop length, enable auto–record or a count–in and your loops will automatically close, no hands or feet required. Big onscreen controls allow for easy configuration and tactile control by vocalists or beat boxers. Focus on your performance instead of fiddling with dip switches or complex menu’s. Be Creative Create 4 tracks with endless layers of overdubs to build your performance. Record a Chorus, Verse and Bridge and switch between them seamlessly or create a 1 bar percussie loop on track one, a 4 bar chord progression on track two and layer a bass line on top, all in perfect synchronisation. Rhythm Guide The builtin rhythm guide provides a rhythmic backing. Use the internal metronome for practice, import drum loops from virtually anywhere or host and control your favourite rhythm apps to enhance your performance. MIDI master lets you control MIDI hardware, and MIDI slave lets Quantiloop follow it. Ableton Link lets you even play in time over WiFi with external apps and devices. Quantisation aligns your actions to the nearest measure or beat so you stay in time, and real-time tempo control sets the pace. Prefer setting your own pace, disable quantisation and Quantiloop will react to your actions with minimum latency to create tight synchronised recordings. FX Assign up to 3 simultaneous effects to the input. Use the built-in transpose to covert your guitar into a bass, or host your guitar amp sim directly in Quantiloop. The results will be recorded into your loops. Or assign up to 3 simultaneous track effects to the output. Use the tape stop to add drama, introduce a key change to build up your performance, or host an Inter-App audio/AU reverb processor. Track FX may be assigned to a single track, all tracks or the combined output. Features • Free, Synced and Paralel,Serial, Mixed Playing Styles • Multiple Quantise Modes • Multiple Stop Modes • Unique Dub Mode and Mute Mode • Unlimited Overdubs • Overdub Decay • Undo / Redo • Auto Record • High quality stereo audio • Clear loop status display • Rhythm guide with optional auto-start, auto-stop and count-in • Audible and Visual Metronome • Send start, stop and host sync to hosted rhythm apps. • Sync to host when embedded in an Inter-App-Audio host • Real-time Tempo Control • Extensive MIDI control • Multiple Assignments per MIDI controller (tap, hold, double tap) • MIDI Program Change support for changing presets • Supports Audiobus and Inter-App-Audio and Audio Units (AUv3) • Individual outputs for each track and rhythm • Synchronise to other apps and devices with Ableton Link • MIDI clock sync (both slave and master) • 4 physical/iaa/au/audiobus inputs routable to any track • 8 outputs (main, monitor, track 1-4, rhythm, input out) • 3 assignable input Fx, including transpose, reverb and IAA, AUv3 • 3 assignable track Fx, including transpose, reverse, tape stop, fade and IAA, AUv3 • Cloud (iCloud, Dropbox, Audioshare …) import / export • AudioCopy/Paste • Open In • Store Phrase Presets in unlimited banks with 100 presets each • Individual Volume and panning controls for each track

About

Roxsyn Guitar Synthesizer

Transform your guitar or bass into a powerful, expressive polyphonic synthesizer without MIDI. This app synthesizes your instrument directly, capturing every nuance of your playing for rich, responsive synth sounds. No special pickups or hardware needed, just connect to your audio interface.

Highlights
  • Direct guitar synthesis (no MIDI)
  • Metamorphic signal generators (oscillators)
  • Dual filter banks with custom virtual-analog filters
  • Guitar-optimized envelopes with adjustable triggers
  • Powerful arpeggiator with multiple algorithms
  • Modulation matrix for parameter control
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Introducing a revolutionary new way to turn your guitar or bass into a fully featured polyphonic synth: Roxsyn, the world’s first metamorphic guitar synthesizer. Expressive, fast and responsive to every nuance, it is a league apart from all other guitar synths to date. Unhappy with cold and temperamental guitar-to-MIDI synths that dominate the market, we developed a completely new approach to guitar synthesis. Our all-original technology synthesizes your guitar directly, without the use of MIDI notes. Rescued from being a poor keyboard substitute, your guitar suddenly becomes an integral part of the synth. It's alive! There is no pitch tracking involved. There are no pitch estimation errors, octave glitches, or garbled chords. There is no over-complicated G2M between your guitar and synth to destroy everything human about your playing. Instead, Roxsyn’s metamorphic sound generation technology retains all the personality of your sound: vibrato, slides, bends, dynamics, even extended technique. The result is a polyphonic synthesizer that is as fast and accurate as it is richly expressive. No need for special MIDI pickups or hardware, either: just plug into your favorite Lightning/USB audio interface, and start synthing! ::Powerful Synth Engine:: Roxsyn’s big synth heart is its three metamorphic signal generators (AKA oscillators). Each generator offers 5 unique waveforms, and has a 4+ octave range to cover a wide spectrum of frequencies. They also feature stereo panning, and can route into either of Roxsyn’s dual filter banks. You can even dial in your guitar directly into the synth engine for even bigger sounds. ::Dual Filter Banks:: Each containing four custom virtual-analog filter types and dedicated envelopes, the filter banks help sculpt the synth generators in countless new ways. The envelopes are specially designed for the guitar, and are driven by a fully adjustable automatic trigger generator controlled by your playing dynamics. Envelopes offer original features like finite-duration sustain stages, as well as the ability to receive or ignore trigger-off messages. They can also be triggered externally via MIDI controllers like an expression pedal. An additonal envelope controls the amplitude of the signal, giving you even more options in creating synth sounds. ::Arpeggiator:: Instantly transform sustained guitar notes into fast (or slow), complex patterns with Roxsyn’s powerful yet easy to use arp. There are 8 stepping algorithms to choose from, as well as settable note value, swing, and note repeats. You can even route the arp to any combination of the 3 voice generators — enabling you to layer a non-arpeggiated sound with an arp pattern. What's more, the arp can send trigger signals into any of Roxsyn’s 4 envelopes, and even reset the LFOs. So it’s also a handy rhythmic / trance tool as well! ::Modulation & FX:: Roxsyn’s user friendly modulation matrix lets you manipulate parameters (pitch, amplitude, filters, etc) using its two LFOs and mod envelope. Add subtle vibrato, even glide simulation, or go full-on berserk. LFOs each have 9 waveforms, and feature beat syncing. Each matrix row can take LFOs or the mod envelope as a modulator or control, and can even use external control sources. And if you like your synths on the spicy side, Roxsyn comes with top-notch stereo FX specially developed to evoke extra synthiness: Powerful algorithmic reverb with the sound of countless rooms, phasing, modulating, 2-channel delay, and graphic EQ. ::Pro Features:: 500+ factory presets with bass, lead, pad, arp sounds & more. Easily create & share your own presets. Audio Unit v3, Ableton Link. Native 64-bit processing at up to 96kHz. 160+ MIDI controllable parameters; MIDI learn & map save/share; tapedeck (in the standalone app), so you can record, loop & share your ideas on the go, and many more handy features.

Screenshots

Quantiloop Pro4 screens
Roxsyn Guitar Synthesizer4 screens

Verdict

The call

The clearest difference is price: Quantiloop Pro at $14.99 against Roxsyn Guitar Synthesizer's $19.99. Quantiloop Pro also leads on review sentiment (94% vs 72%) and update cadence (every 3 months vs every 9 months). On ratings volume, 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

Quantiloop Pro costs $14.99 and Roxsyn Guitar Synthesizer $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Quantiloop Pro holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 201 and 90 respectively. Written reviews point the same way: 94% of Quantiloop Pro's written reviews are positive against 72% of Roxsyn Guitar Synthesizer's.

UpkeepUpdate frequency

Quantiloop Pro ships an update every 3 months, Roxsyn Guitar Synthesizer every 9 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard7 real differences · 4 level
Quantiloop Pro versus Roxsyn Guitar Synthesizer: the parameters behind the verdict, then further details
ParameterQuantiloop ProRoxsyn Guitar Synthesizer
Price$14.99 — better$19.99
Rating4.9 (201 ratings) — better4.7 (90 ratings)
Positive reviews94.3% of reviews — better72.1% of reviews
Number of ratings201 — better90
Update frequencyEvery 3 months — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
Best chart rank#199 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.6
Further details — not scored
Size16 MB32 MB
Age rating4+4+
DeveloperStephan MarxYonac Inc.

Customer experience

Quantiloop Pro

All ratings201 ratings
Positive98.0%
Neutral1.0%
Negative1.0%
Written reviews175 reviews
Positive94.3%
Neutral1.7%
Negative4.0%

Roxsyn Guitar Synthesizer

All ratings90 ratings
Positive92.2%
Neutral3.3%
Negative4.4%
Written reviews61 reviews
Positive72.1%
Neutral9.8%
Negative18.0%

Bugs and requests

Quantiloop Pro

Reported bugs

3 issues
  • Crashes or freezes on certain devices
  • Issues with MIDI sync or connectivity
  • Problems with audio routing or effects processing

Requested features

5 requests
  • Ability to export/import presets and settings
  • Support for more input channels or tracks
  • Improved stability and compatibility with older iOS versions
  • Addition of a macOS version
  • More customization options for the user interface

Roxsyn Guitar Synthesizer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Quantiloop Pro

No in-app purchases

None

Roxsyn Guitar Synthesizer

No in-app purchases

Questions

Is Quantiloop Pro free?
Quantiloop Pro costs $14.99, with no in-app purchases.
Is Roxsyn Guitar Synthesizer free?
Roxsyn Guitar Synthesizer costs $19.99, with no in-app purchases.
Which has better reviews, Quantiloop Pro or Roxsyn Guitar Synthesizer?
Quantiloop Pro is rated higher. Quantiloop Pro averages 4.9 out of 5 from 201 ratings, while Roxsyn Guitar Synthesizer averages 4.7 from 90 ratings.
Do Quantiloop Pro or Roxsyn Guitar Synthesizer have ads?
Neither Quantiloop Pro nor Roxsyn Guitar Synthesizer shows ads.
Which is updated more often, Quantiloop Pro or Roxsyn Guitar Synthesizer?
Quantiloop Pro ships an update every 3 months, and Roxsyn Guitar Synthesizer every 9 months. Most recently, Quantiloop Pro was updated on October 26, 2026 and Roxsyn Guitar Synthesizer on October 24, 2026.

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