Comparison

Poseidon Synth vs ID700

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

Head to head
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

About

ID700

This app is a software synthesizer that recreates the voice architecture of the Buchla 700. It offers hybrid FM and waveshaping synthesis with extensive customization options for sound design. It functions as a standalone app or an AUv3 plugin for music production software.

Highlights
  • Hybrid FM and waveshaping synthesis
  • AUv3 and Standalone support
  • Twelve voices with unique algorithms
  • Fourteen complex envelopes per voice
  • Two waveshapers per voice
  • MPE capability
  • Scala scale file support
Features
Read full description

ID700 is a hybrid FM/waveshaping software synthesizer based on the voice architecture of the Buchla 700. ID700 runs in standalone mode and as an AUv3 plugin (Logic Pro, GarageBand, AUM, Cubasis 3). HISTORY In 1987 Don Buchla released the Buchla 700 synthesizer. It was the next logical step from Don's previous digital synths (the Buchla 400, Touché, Buchla 500) but was also influenced by the synth trends of the 1980's, specifically FM synthesis and the all-in-one workstation concept. As usual, Don was ahead of the curve and the 700 never took off. Very few were sold and even fewer functioning units exist today. I always loved the sound of Don's digital oscillators, and combined with the scarcity of the instrument it seemed like a fun project to recreate it in software and reintroduce its concepts to the world. FEATURES * AUv3 and Standalone support on iOS * twelve voices of four operator FM with twelve unique algorithms * fourteen complex envelopes per voice * two hundred professionally designed presets * two waveshapers per voice * preset randomizer * over forty factory wave shapes plus an editor for user created shapes * Scala scale file support with over four thousand included tunings from the Scala scale archive * MPE (MIDI Polyphonic Expression) capability for MPE controllers like the Roli Seabord, Linnstrument, and Sensel Morph * advanced MIDI implementation (including 14-bit CCs and Program Change) * an in-depth manual (60+ pages) is available in the app and from our website * iCloud support for sharing presets, waveshapes, and tunings between devices * up to 16x oversampling

Verdict

The call

The clearest difference is rating: ID700 at 4.8 against Poseidon Synth's 4.0. ID700 also leads on review sentiment (88% vs 59%) and update cadence (monthly vs every 4 months). Poseidon Synth's advantage is price ($7.99 vs $12.99). 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

CostPrice · In-app purchases · Ads · Monetization

Poseidon Synth costs $7.99 and ID700 $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ID700 holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 33 and 128 respectively. Written reviews point the same way: 59% of Poseidon Synth's written reviews are positive against 88% of ID700's.

UpkeepUpdate frequency

Poseidon Synth ships an update every 4 months, ID700 monthly. The most recent releases landed on August 4, 2026 and August 13, 2026 respectively.

Scorecard5 real differences · 5 level
Poseidon Synth versus ID700: the parameters behind the verdict, then further details
ParameterPoseidon SynthID700
Price$7.99 — better$12.99
Rating4.0 (33 ratings)4.8 (128 ratings) — better
Positive reviews58.8% of reviews87.5% of reviews — better
Number of ratings33128 — better
Update frequencyEvery 4 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPad
Requires iOS12.012.0
Further details — not scored
Size328 MB51 MB
Age rating4+4+
DeveloperHarry GohsJonathan Schatz

Customer experience

Poseidon Synth

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

ID700

All ratings128 ratings
Positive93.8%
Neutral3.1%
Negative3.1%
Written reviews40 reviews
Positive87.5%
Neutral5.0%
Negative7.5%

In-app purchases

None

Poseidon Synth

No in-app purchases

None

ID700

No in-app purchases

Questions

Is Poseidon Synth free?
Poseidon Synth costs $7.99, with no in-app purchases.
Is ID700 free?
ID700 costs $12.99, with no in-app purchases.
Which has better reviews, Poseidon Synth or ID700?
ID700 is rated higher. Poseidon Synth averages 4.0 out of 5 from 33 ratings, while ID700 averages 4.8 from 128 ratings.
Do Poseidon Synth or ID700 have ads?
Neither Poseidon Synth nor ID700 shows ads.
Which is updated more often, Poseidon Synth or ID700?
Poseidon Synth ships an update every 4 months, and ID700 monthly. Most recently, Poseidon Synth was updated on August 4, 2026 and ID700 on August 13, 2026.

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