Comparison

Music Notator 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

Music Notator

Create and edit musical scores, including melodies, lead sheets with chords and lyrics, and full arrangements. Access your compositions online and on any device with an internet connection.

Highlights
  • Write melodies, lead sheets, and full scores
  • Intuitive touch-based note entry and editing
  • Virtual keyboard for note input
  • Chord and lyric insertion
  • Export scores as PDF
  • 19 score templates
  • MIDI playback with 128 instruments
Features
Read full description

Write down melodies, lead sheets with chords and lyrics, arrangements, and full blown scores with the brand new scorio Music Notator app. Follow your inspiration - on a bench in the park, in a bar, in the subway, wherever you have internet access. Enjoy the comfortable and intuitive Music Notator App. Enter and edit music intuitively with the tips of your fingers. Short touches select notation elements, long touches let you insert new notes into melodies and chords. Edit notes by moving them with your fingers. Fast scrolling, zooming, page turning and orientation change give you quick and comfortable access to every little detail and a perfect overview. Edit lyrics, chords and modify the score structure with the dialog area on the right side of the app. scorio Music Notator App works hand in hand with scorio notation portal on the web and requires an internet connection. When you write and save a score within the app you will also find it online in your scorio account. After saving, you can edit your compositions in any web browser, even outside the app on your PC or Mac. Yes, even on a friend's laptop. App features include: - Insert and edit notes and other notation elements - Virtual Keyboard for entering notes - Insert and edit chord and fret symbols - Display and edit lyrics - Export scores as high quality PDF files - Select from 19 score templates - Edit score structure (add/delete staves) - Transpose scores - Automatic part extraction - MIDI play back with 128 selectable MIDI instruments - Load scores from the scorio database - Publish your scores - Continue to work on the scores in your account on PC, Mac and other tablet devices

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

Music Notator4 screens

Verdict

The call

The clearest difference is review sentiment: Poseidon Synth at 59% against Music Notator's 10%. Poseidon Synth also leads on rating (4.0 vs 1.7) and ratings volume (33 vs 7). Music Notator's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 12.0). On update cadence, ads, in-app purchases and monetization model 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

Music Notator costs $8.99 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

Poseidon Synth holds the better App Store score, 4.0 against 1.7. Both are backed by a comparable volume of ratings — 7 and 33 respectively. Written reviews point the same way: 10% of Music Notator's written reviews are positive against 59% of Poseidon Synth's.

UpkeepUpdate frequency

Music Notator ships an update every 2 months, Poseidon Synth every 4 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Music Notator versus Poseidon Synth: the parameters behind the verdict, then further details
ParameterMusic NotatorPoseidon Synth
Price$8.99$7.99 — better
Rating1.7 (7 ratings)4.0 (33 ratings) — better
Positive reviews10.3% of reviews58.8% of reviews — better
Number of ratings733 — better
Update frequencyEvery 2 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS9.0 — better12.0
Further details — not scored
Size113 MB328 MB
Age rating4+4+
Developerscorio GmbHHarry Gohs

Customer experience

Music Notator

All ratings7 ratings
Positive14.3%
Neutral0.0%
Negative85.7%
Written reviews39 reviews
Positive10.3%
Neutral0.0%
Negative89.7%

Poseidon Synth

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

In-app purchases

None

Music Notator

No in-app purchases

None

Poseidon Synth

No in-app purchases

Questions

Is Music Notator free?
Music Notator costs $8.99, with no in-app purchases.
Is Poseidon Synth free?
Poseidon Synth costs $7.99, with no in-app purchases.
Which has better reviews, Music Notator or Poseidon Synth?
Poseidon Synth is rated higher. Music Notator averages 1.7 out of 5 from 7 ratings, while Poseidon Synth averages 4.0 from 33 ratings.
Do Music Notator or Poseidon Synth have ads?
Neither Music Notator nor Poseidon Synth shows ads.
Which is updated more often, Music Notator or Poseidon Synth?
Music Notator ships an update every 2 months, and Poseidon Synth every 4 months. Most recently, Music Notator was updated on October 22, 2026 and Poseidon Synth on October 24, 2026.

Other comparisons