Comparison

Quantiloop Pro vs Stringcalculator

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
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

Stringcalculator

Calculate string properties for various instruments. Determine diameter, tension, and tone based on material, frequency, and scale length. Supports multiple units of measurement.

Highlights
  • Calculate string diameter, tension, and tone
  • Supports gut, nylgut, carbon, Tynex, and nylon strings
  • Set custom frequencies
  • Calculate in cm, mm, or inches
  • Adjustable scale length
Features
Read full description

A string calculator to calculate single strings for historical (or modern) stringed instruments. Calculates strings from gut, nylgut, carbon (PVF), Tynex and nylon. Diameter, tension, tone and scale can be calculated. You can set any frequency instead of the chamber tone a'. Calculates in cm, mm or inch.

Screenshots

Quantiloop Pro4 screens
Stringcalculator1 screens

Verdict

The call

The clearest difference is price: Stringcalculator at $2.99 against Quantiloop Pro's $14.99. Quantiloop Pro's advantage is update cadence (every 3 months vs every 16 months) and iOS requirement (12.0 vs 17.6). On review sentiment, 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 Stringcalculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Quantiloop Pro ships an update every 3 months, Stringcalculator every 16 months. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

Scorecard4 real differences · 6 level
Quantiloop Pro versus Stringcalculator: the parameters behind the verdict, then further details
ParameterQuantiloop ProStringcalculator
Price$14.99$2.99 — better
Rating4.9 (201 ratings) — better—
Positive reviews94.3% of reviews100.0% of reviews — better
Number of ratings201 — better—
Update frequencyEvery 3 months — betterEvery 16 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.6
Further details — not scored
Size16 MB1 MB
Age rating4+4+
DeveloperStephan MarxMartin Uhlig

Customer experience

Quantiloop Pro

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

Stringcalculator

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Stringcalculator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Quantiloop Pro

No in-app purchases

None

Stringcalculator

No in-app purchases

Questions

Is Quantiloop Pro free?
Quantiloop Pro costs $14.99, with no in-app purchases.
Is Stringcalculator free?
Stringcalculator costs $2.99, with no in-app purchases.
Do Quantiloop Pro or Stringcalculator have ads?
Neither Quantiloop Pro nor Stringcalculator shows ads.
Which is updated more often, Quantiloop Pro or Stringcalculator?
Quantiloop Pro ships an update every 3 months, and Stringcalculator every 16 months. Most recently, Quantiloop Pro was updated on October 8, 2026 and Stringcalculator on September 30, 2026.

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