Comparison

SpringSound vs Compositor NTP

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

Head to head
About

SpringSound

This app is a physical-modeling audio synthesizer that simulates sound through the interaction of springs, masses, and activators. It offers detailed control over various physical parameters and comes with a large library of presets. It can be used as a sound generator or effect, and supports MIDI and expressive controllers.

Highlights
  • Physical modeling sound synthesis
  • Detailed control of physical parameters
  • Large set of sound presets
  • Audio-In effect capability
  • MIDI and MPE support
  • iOS Continuum Remote integration
Features
Read full description

SpringSound is a physical-modeling audio synthesizer that produces sounds by simulating interactions and vibrations of a set of activators and masses connected to springs. The model offers detailed control of an array of features including: gravity, bouncing, fluid and static friction, mechanical limits, non-linear functions, and more. SpringSound is provided with a very large set of sound presets that you can tweak and save. Small video introductions are available: http://www.youtube.com/watch?v=L1GF7HkSV9c and https://www.youtube.com/watch?v=gdYuZ07nmRo And an audio demo of some presets: https://soundcloud.com/christophe-duquesne/demopresetspringsound It can be used as a sound generator or as an effect using its Audio-In feature, opening a new world of physical modeled effects. It is fully Audiobus® 2 and inter-app audio compatible, and manage state saving. SpringSound can be controlled by a standard MIDI keyboard and directly from the iOS device screen. It is complete with the new MIDI MPE (expressive MIDI) and therefore can be controlled by most expressive controllers like the Haken Continuum, ROLI Seaboard, Linnstrument, Madrona Labs Soundplane, etc. SpringSound app is designed for optimum use with the Haken Continuum (www.hakenaudio.com) and integrate an IOS Continuum Remote (iPad only) allowing a very comprehensive and accurate remote control of the Continuum from your iPad (access to all parameters except programming the Eagan Matrix). SpringSound has be designed to explore sounds domains you won’t be able to access with other synthesis technics. It expands your sonic palette with a new world of physical sounds. It is a rich musical instrument, a sophisticated sound-design tool and an entertaining sonic playground. SpringSound is the big brother of my former Ackorage-Spring app.

About

Compositor NTP

Features
Read full description

Compositor NTP is a single solution for metronome and Ethernet education. It is a real-time device, which uses physical modeling as a source for NTP synchronous signal. Using the iOS version you can transform your iPhone into rhythm modeling station. You can adjust parameters visible on the screen using menus, dials and virtual keyboard. All of the dials smoothly interpolate for click-free performance. Compositor NTP is your entry point into the world of Ethernet communications. It dynamically updates the sound engine in accordance to IP address settings for three loopback channels. - Compositor NTP is an instrument that uses upper-level C++ programming, which makes it available as a pure 64-bit DSP application - First ever musical metronome with odometry - Convenient tempo and tone control - Natal chart of Constellations and month year cycle - Simulation of Solar System objects - Audio loopback and packet simulation - Telescope style control over reverberation channel

Screenshots

SpringSound1 screens
Compositor NTP1 screens

Verdict

The call

The clearest difference is update cadence: Compositor NTP at every 2 months against SpringSound's every 9 months. On price, 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

SpringSound costs $2.99 and Compositor NTP $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SpringSound ships an update every 9 months, Compositor NTP every 2 months. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

Scorecard1 real difference · 9 level
SpringSound versus Compositor NTP: the parameters behind the verdict, then further details
ParameterSpringSoundCompositor NTP
Price$2.99$2.99
Rating4.2 (19 ratings) — better—
Positive reviews73.7% of reviews—
Number of ratings19 — better—
Update frequencyEvery 9 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better16.2
Further details — not scored
Size30 MB4 MB
Age rating4+4+
DeveloperChristophe DuquesneRuslan Yusipov

In-app purchases

None

SpringSound

No in-app purchases

None

Compositor NTP

No in-app purchases

Questions

Is SpringSound free?
SpringSound costs $2.99, with no in-app purchases.
Is Compositor NTP free?
Compositor NTP costs $2.99, with no in-app purchases.
Do SpringSound or Compositor NTP have ads?
Neither SpringSound nor Compositor NTP shows ads.
Which is updated more often, SpringSound or Compositor NTP?
SpringSound ships an update every 9 months, and Compositor NTP every 2 months. Most recently, SpringSound was updated on October 12, 2026 and Compositor NTP on October 3, 2026.

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