Comparison

Laplace vs Poseidon Synth

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

Head to head
About

Laplace

This app is a physical modeling synthesizer that allows users to create a wide range of sounds, from strings and pipes to metallic textures. It provides tools for detailed sound shaping and is compatible with AUv3 environments.

Highlights
  • AUv3-compatible synthesizer
  • Physical modeling sound engine
  • Bowed string emulation
  • Plucked string emulation
  • Blown pipe emulation
  • Metallic texture generation
  • Detailed sound shaping tools
Features
Read full description

Laplace is an AUv3-compatible physical modeling synthesizer designed for those who revel in sound creation. Whether you’re crafting the nuanced tones of bowed strings, the vibrant attack of plucked strings, the breathy resonance of blown pipes, or rich metallic textures, Laplace offers the tools to shape your sound with clarity and depth. 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/

About

Poseidon Synth

Explore vast sonic landscapes with this advanced synthesizer. It combines analog synthesis with spectral modeling for unique sound design, offering powerful filters, spatialization, and a vast library of presets and sound models.

Highlights
  • Spectral model oscillator
  • F-Domain Filter with variable slope
  • Spatializer for stereo movement
  • Extensive sound browser
  • Arpeggiator with programmable sequences
  • Built-in effects suite
Read full description

Poseidon Synth - The Ocean of Sound For all creatures in the ocean of sound - Sonic textures from other worlds, Analog signature sounds,  Cut-through-the-mix leads and silkily smooth pads: Poseidon sets a new standard for sound design and ease of use. All of this was made possible through a combination of the familiar, conceptual simplicity of the analog synthesis and our frequency domain based Spectral modelling synthesis technology. Spectral model oscillator Select a basic sound model from over hundred delivered with Poseidon. The basic sound model determines the sound characteristic you want to start: taking a artificial model like “Sawtooth” gives you analog style sounds. Use complex models from analyzed samples for earth shaking ambients and evolving pads. Model parameters High level controls allow for changing the spectral shape, the harmonicity and balances the level of residual noise and spectral amount of the oscillator model. F-Domain Filter The newly developed F-Domain filter allow for drastic changes in the resulting sound spectrum. Five filter types including lowpass/highpass characteristic can be used to shape the sound. They have the usual controls like cutoff but also very unusual ones like a variable slope ranging from 0 dB to 72 dB / Octave and independent controls for resonance and bandwidth! This kind of controls are only possible in the context of our F-Domain synthesis technology. This results in an extremely clear filter sound with breathtaking fast modulation possibilities.

The filter type “Inverse” interprets the sound model as a "Source" and a resonant body "Filter". The cutoff parameter shifts the filterbase - this is the equivalent to making the instrument body smaller or bigger. Spatializer This simple control gives your sound a distinctive moving distribution in the stereo panorama. Every atomic sound particle has it´s own path through the space ! Sound browser The sound browser in Poseidon gives you a fast selection of sounds based on category and timbre. Spectral modelling synthesis • Harmonic/Inharmonic/Noise sound models • 512 oscillators per voice • 300 Sound models / 600 factory presets Unique sound control • Pitch modulation / Harmonicity control • Time machine • Timbre control • Frequency Domain Filter • Spatializer Arpeggiator • Uses programmable sequences with up to 32 steps.  • Can trigger single notes and chords. • Unique randomiser generates Arpeggios with 100% usability. • 32 Arpeggios included, unlimited user arpeggios possible. • For each step you can program tie, accent, transposition and note order Effects • Chorus • Phaser • Flanger • Distortion (aliasing free!) • Equalizer • Echo/Delay • Reverb Global • Audiobus 3 compatible (Input slot) • Audio Unit AUv3 • Inter-app audio compatible (Instrument/Generator) • CoreMIDI / Virtual MIDI / Tempo Sync / MIDI Learn • Audio recorder with Metronome. • Audio pasteboard / File sharing. • Ableton Link support • Bluetooth audio A2DP

Screenshots

Laplace4 screens

Verdict

The call

The clearest difference is rating: Laplace at 5.0 against Poseidon Synth's 4.0. Laplace also leads on review sentiment (90% vs 59%) and update cadence (every 6 weeks vs every 4 months). On price, ratings volume, ads and in-app purchases 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

Laplace costs $8.00 and Poseidon Synth $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Laplace holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 36 and 33 respectively. Written reviews point the same way: 90% of Laplace's written reviews are positive against 59% of Poseidon Synth's.

UpkeepUpdate frequency

Laplace ships an update every 6 weeks, Poseidon Synth every 4 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Laplace versus Poseidon Synth: the parameters behind the verdict, then further details
ParameterLaplacePoseidon Synth
Price$8.00$7.99 — better
Rating5.0 (36 ratings) — better4.0 (33 ratings)
Positive reviews89.8% of reviews — better58.8% of reviews
Number of ratings36 — better33
Update frequencyEvery 6 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS12.012.0
Further details — not scored
Size7 MB328 MB
Age rating4+4+
DevelopericeWorks, Inc.Harry Gohs

Customer experience

Laplace

All ratings36 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews49 reviews
Positive89.8%
Neutral4.1%
Negative6.1%

Poseidon Synth

All ratings33 ratings
Positive72.7%
Neutral12.1%
Negative15.2%
Written reviews51 reviews
Positive58.8%
Neutral15.7%
Negative25.5%

In-app purchases

None

Laplace

No in-app purchases

None

Poseidon Synth

No in-app purchases

Questions

Is Laplace free?
Laplace costs $8.00, with no in-app purchases.
Is Poseidon Synth free?
Poseidon Synth costs $7.99, with no in-app purchases.
Which has better reviews, Laplace or Poseidon Synth?
Laplace is rated higher. Laplace averages 5.0 out of 5 from 36 ratings, while Poseidon Synth averages 4.0 from 33 ratings.
Do Laplace or Poseidon Synth have ads?
Neither Laplace nor Poseidon Synth shows ads.
Which is updated more often, Laplace or Poseidon Synth?
Laplace ships an update every 6 weeks, and Poseidon Synth every 4 months. Most recently, Laplace was updated on October 21, 2026 and Poseidon Synth on October 24, 2026.

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