SpringSound vs Lagrange
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Lagrange
This app is a hybrid synthesizer that simplifies sound creation by using oscillator algorithms to manage complex parameters. It focuses on quickly achieving desired sounds by selecting the appropriate oscillator type.
- AUv3-compatible synthesizer
- Simplified sound creation
- Oscillator algorithms
- Quick sound selection
- Hybrid synthesis
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Lagrange is an AUv3-compatible synthesizer designed to simplify sound creation by concealing complex parameter adjustments within oscillator algorithms. Rather than emphasizing precise sound design, this synthesizer prioritizes selecting the right oscillator type to quickly achieve the sound that suits your needs. For more detailed information about the product, please visit the website. The website offers detailed product descriptions, manuals and videos, as well as important notices. https://icegear.net/
Screenshots
Verdict
The clearest difference is rating: Lagrange at 4.8 against SpringSound's 4.2. Lagrange also leads on update cadence (every 2 weeks vs every 9 months) and review sentiment (95% vs 70%). SpringSound's advantage is price ($2.99 vs $8.00). On ads, in-app purchases, monetization model 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
SpringSound costs $2.99 and Lagrange $8.00 up front. Neither carries in-app purchases, so what you see is what you pay.
Lagrange holds the better App Store score, 4.8 against 4.2. Both are backed by a comparable volume of ratings — 19 and 57 respectively. Written reviews point the same way: 70% of SpringSound's written reviews are positive against 95% of Lagrange's.
SpringSound ships an update every 9 months, Lagrange every 2 weeks. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.
| Parameter | SpringSound | Lagrange |
|---|---|---|
| Price | $2.99 — better | $8.00 |
| Rating | 4.2 (19 ratings) | 4.8 (57 ratings) — better |
| Positive reviews | 70.0% of reviews | 95.5% of reviews — better |
| Number of ratings | 19 | 57 — better |
| Update frequency | Every 9 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 30 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Christophe Duquesne | iceWorks, Inc. |
Customer experience
SpringSound
Lagrange
In-app purchases
SpringSound
No in-app purchases
Lagrange
No in-app purchases
