Poseidon Synth vs Xoraphone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Spectral model oscillator
- F-Domain Filter with variable slope
- Spatializer for stereo movement
- Extensive sound browser
- Arpeggiator with programmable sequences
- Built-in effects suite
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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
Xoraphone
Experience a unique musical instrument that replicates the human voice. Explore 7 notes from Indian classical music, perfect for musicians, students, and music enthusiasts.
- Human voice sound simulation
- 7 Indian classical music notes (swara)
- Suitable for musicians
- Ideal for classical music students
- Interactive music exploration
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“Every musical instrument has tried to attain a human sound” - Unknown Artist Finally, for the first time in history, there is Xoraphone, a musical instrument that sounds like the human voice! Xoraphone consists of 7 notes (swara) from Indian classical music. Whether you are a musician, a student of classical music, or someone who has an interest in music, you are going to love playing the Xoraphone. Give It A Try! Music is a vast ocean and Xoraphone is a tiny attempt in that ocean. Please explore and give us your feedback to help us further sail through this incredible discovery!
Screenshots
Verdict
The clearest difference is price: Xoraphone at Free against Poseidon Synth's $7.99. Xoraphone also leads on rating (5.0 vs 4.0) and update cadence (daily vs every 4 months). Poseidon Synth's advantage is ratings volume (33 vs 2) and review sentiment (59% vs 50%). On 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
Xoraphone is free to download; Poseidon Synth costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Xoraphone holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Poseidon Synth has 33 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 59% of Poseidon Synth's written reviews are positive against 50% of Xoraphone's, so the app with the better star average is not the one people write more warmly about.
Poseidon Synth ships an update every 4 months, Xoraphone daily. The most recent releases landed on August 4, 2026 and June 1, 2026 respectively.
| Parameter | Poseidon Synth | Xoraphone |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 4.0 (33 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 58.8% of reviews — better | 50.0% of reviews |
| Number of ratings | 33 — better | 2 |
| Update frequency | Every 4 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 328 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Harry Gohs | Alphabing LLC |
Customer experience
Poseidon Synth
Xoraphone
In-app purchases
Poseidon Synth
No in-app purchases
Xoraphone
No in-app purchases









