# Poseidon Synth vs Phosphor 3

The clearest difference is rating: Phosphor 3 at 4.7 against Poseidon Synth's 4.0. Phosphor 3 also leads on review sentiment (79% vs 59%) and price ($5.99 vs $7.99). Poseidon Synth's advantage is update cadence (every 4 months vs every 11 months) and ratings volume (33 vs 9). On ads, in-app purchases, monetization model and device support there is nothing between them.

Poseidon Synth costs $7.99 and Phosphor 3 $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Phosphor 3 holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 33 and 9 respectively. Written reviews point the same way: 59% of Poseidon Synth's written reviews are positive against 79% of Phosphor 3's.

Poseidon Synth ships an update every 4 months, Phosphor 3 every 11 months. The most recent releases landed on August 4, 2026 and July 6, 2026 respectively.

## The numbers

| Metric | Poseidon Synth | Phosphor 3 |
| --- | --- | --- |
| Price | $7.99 | **$5.99** |
| Rating | [4.0 (33 ratings)](https://appshunter.io/ios/app/poseidon-synth/id1045058006/reviews) | **[4.7 (9 ratings)](https://appshunter.io/ios/app/phosphor-3/id1499115553/reviews)** |
| Number of ratings | **33** | 9 |
| Positive reviews | 58.8% of reviews | **78.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 11 months |
| Monetization | Paid | Paid |
| Size | 328 MB | 27 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Harry Gohs](https://appshunter.io/developer/382428644) | [Audio Damage, Inc.](https://appshunter.io/developer/1248448317) |

## What reviewers say

### Poseidon Synth

[App page](https://appshunter.io/ios/app/poseidon-synth/id1045058006)

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

**In-app purchases:** none


### Phosphor 3

[App page](https://appshunter.io/ios/app/phosphor-3/id1499115553)

This app recreates a vintage digital synthesizer, offering a faithful emulation of a classic sound engine. It includes modern features like MPE, extensive modulation, and a new UI for sonic exploration.

**Highlights:** Vintage digital synthesizer emulation, Additive synthesis engine, MPE support, Extensive modulation routing, Preset manager, Tuning tables

**In-app purchases:** none


## Frequently asked questions

### Is Poseidon Synth free?

Poseidon Synth costs $7.99, with no in-app purchases.

### Is Phosphor 3 free?

Phosphor 3 costs $5.99, with no in-app purchases.

### Which has better reviews, Poseidon Synth or Phosphor 3?

Phosphor 3 is rated higher. Poseidon Synth averages 4.0 out of 5 from 33 ratings, while Phosphor 3 averages 4.7 from 9 ratings.

### Do Poseidon Synth or Phosphor 3 have ads?

Neither Poseidon Synth nor Phosphor 3 shows ads.

### Which is updated more often, Poseidon Synth or Phosphor 3?

Poseidon Synth ships an update every 4 months, and Phosphor 3 every 11 months. Most recently, Poseidon Synth was updated on August 4, 2026 and Phosphor 3 on July 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*