Comparison

Poseidon Synth vs TB Flowtones

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

TB Flowtones

This virtual analog synthesizer app offers a true VA synthesis engine with analog-modeled filters and extensive modulation options. Create warm, analog-sounding music with a powerful architecture, diverse waveforms, and pro-grade effects. It also includes an integrated step sequencer and hundreds of presets.

Highlights
  • True virtual analog synthesis engine
  • Analog-modelled non-linear filters
  • Extensive modulation options
  • Pro-grade studio effects
  • Integrated step sequencer
  • Hundreds of presets and intelligent randomizer
Read full description

TB Flowtones Virtual Analog Synthesizer app and AUv3 plug-in Thanks to it's true VA synthesis engine, the use of analog-modelled non-linear filters and extensive modulation options, Flowtones sounds warmer and more analog than digital romplers and wavetable-based synths. TB Flowtones comes as stand-alone app as well as AUv3 plugin. True virtual analog synthesis features: - 4 VCO architecture (two voice layers with two VCOs each) - 4 synthesis engine types, in part modelled after famous analog synthesisers - 36 analog VCO waveforms featuring all classic waveforms and more - All VCO waveforms support pulse width modulation - Full stereo and mono unison modes for each VCO independently - Noise and subharmonic oscillators for each VCO - Unique ring and self-modulation matrix - High-quality, warm, non-linear filters (VCF) with over 30 filter types, including unique multi-resonance filters Modulation features: - Four LFOs with 30 waveforms each - LFOs can modulate other LFOs, including themselves! - Three additional envelope generators, with key velocity modulation - Quick access to modulation strengths through context menus - Hundreds of modulation signal paths available - LFOs can produce noise as waveform to randomly modulate other parameters; for example to simulate slight variations in analog filter parameters as they happen in analog circuits. Pro-grade effects - Studio-quality reverb, delay, and chorus effects - Unique formant filter to add vocal character - Analog and digital distortion / bit crushing effects - Master equaliser and peak limiter for final touch - Non-linear power supply simulation for authentic interaction between notes Step sequencer - Fully integrated, intuitive step sequencer - Can trigger chords and note series / phrases - Can run asynchronously or synchronously to the host - Smart copy/paste of note series to improve workflow - Smart zoom: edit fine details while keeping an overview over the full sequence Presets and intelligent randomizer - Flowtones comes with hundreds of presets to spark your creativity - Intelligent randomizer to explore endless sound synthesis possibilities What you should know: - Licenses acquired for this platform are not compatible with other platforms. - Audio Unit (AUv3) extensions require an iPad mini 2, iPad 4 or later models.

Screenshots

TB Flowtones4 screens

Verdict

The call

The clearest difference is rating: TB Flowtones at 4.7 against Poseidon Synth's 4.0. TB Flowtones also leads on review sentiment (83% vs 59%) and device support (3 vs 1). Poseidon Synth's advantage is price ($7.99 vs $9.99). On ratings volume, update cadence, 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

Poseidon Synth costs $7.99 and TB Flowtones $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

TB Flowtones holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 33 and 39 respectively. Written reviews point the same way: 59% of Poseidon Synth's written reviews are positive against 83% of TB Flowtones's.

UpkeepUpdate frequency

Poseidon Synth ships an update every 4 months, TB Flowtones every 3 months. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 6 level
Poseidon Synth versus TB Flowtones: the parameters behind the verdict, then further details
ParameterPoseidon SynthTB Flowtones
Price$7.99 — better$9.99
Rating4.0 (33 ratings)4.7 (39 ratings) — better
Positive reviews58.8% of reviews82.9% of reviews — better
Number of ratings3339 — better
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPadiPhone, iPad, iPod — better
Requires iOS12.0 — better13.0
Further details — not scored
Size328 MB17 MB
Age rating4+4+
DeveloperHarry GohsToneBoosters

Customer experience

Poseidon Synth

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

TB Flowtones

All ratings39 ratings
Positive89.7%
Neutral7.7%
Negative2.6%
Written reviews35 reviews
Positive82.9%
Neutral11.4%
Negative5.7%

In-app purchases

None

Poseidon Synth

No in-app purchases

None

TB Flowtones

No in-app purchases

Questions

Is Poseidon Synth free?
Poseidon Synth costs $7.99, with no in-app purchases.
Is TB Flowtones free?
TB Flowtones costs $9.99, with no in-app purchases.
Which has better reviews, Poseidon Synth or TB Flowtones?
TB Flowtones is rated higher. Poseidon Synth averages 4.0 out of 5 from 33 ratings, while TB Flowtones averages 4.7 from 39 ratings.
Do Poseidon Synth or TB Flowtones have ads?
Neither Poseidon Synth nor TB Flowtones shows ads.
Which is updated more often, Poseidon Synth or TB Flowtones?
Poseidon Synth ships an update every 4 months, and TB Flowtones every 3 months. Most recently, Poseidon Synth was updated on October 7, 2026 and TB Flowtones on October 8, 2026.

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