# PhaseDelayArray vs SynthMaster One for iPhone

The clearest difference is in-app purchases: PhaseDelayArray at none against SynthMaster One for iPhone's 10. PhaseDelayArray also leads on review sentiment (77% vs 66%). SynthMaster One for iPhone's advantage is rating (4.8 vs 4.5) and ratings volume (331 vs 45). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. SynthMaster One for iPhone sells 10 one-off in-app purchases. PhaseDelayArray asks for nothing beyond the download.

SynthMaster One for iPhone holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: SynthMaster One for iPhone has 331 ratings behind it against 45, so its average is the more settled of the two. Written reviews complicate that: 77% of PhaseDelayArray's written reviews are positive against 66% of SynthMaster One for iPhone's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on August 3, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | PhaseDelayArray | SynthMaster One for iPhone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (45 ratings)](https://appshunter.io/ios/app/phasedelayarray/id1472910992/reviews) | **[4.8 (331 ratings)](https://appshunter.io/ios/app/synthmaster-one-for-iphone/id1490902617/reviews)** |
| Number of ratings | 45 | **331** |
| Positive reviews | **76.9% of reviews** | 66.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 9 MB | 297 MB |
| Requires iOS | 11.0 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Neon Silicon](https://appshunter.io/developer/1409314093) | [KV331 Audio](https://appshunter.io/developer/944155925) |

## What reviewers say

### PhaseDelayArray

[App page](https://appshunter.io/ios/app/phasedelayarray/id1472910992)

This audio effect application provides a unique combination of oscillating reverb, modulation, and feedback delay. It can be used to create a wide range of subtle to extreme soundscapes within compatible music production software.

**Highlights:** Oscillating reverb sections, Modulation unit, Feedback delay up to 2 seconds, Multiple mix points, Mono-to-mono, mono-to-stereo, stereo-to-stereo support

**Features:** macOS Compatibility

**In-app purchases:** none


### SynthMaster One for iPhone

[App page](https://appshunter.io/ios/app/synthmaster-one-for-iphone/id1490902617)

This powerful wavetable synthesizer app offers an intuitive workflow for creating new sounds. It features a rich library of wavetables, inspiring factory presets, and real-time modulation feedback for sound design.

**Highlights:** Wavetable synthesis, 300 factory presets, AUv3 support, Files App integration, Real-time modulation feedback, Semi-modular architecture, 32-step arpeggiator/sequencer

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BigTone Club Construction Set | $4.99 | one-time |
| True Trance Sounds Volume 1 | $4.99 | one-time |
| Vandalism Future House | $4.99 | one-time |
| NatLife Retrowave Sounds Vol.1 | $4.99 | one-time |
| Demis Hellen Euphoric Trance | $4.99 | one-time |
| NatLife Progressive&Deep Vol.1 | $4.99 | one-time |
| Vandalism Shocking Future Bass | $4.99 | one-time |
| Venus Theory Trap Sounds | $4.99 | one-time |
| Desktop Presets Upgrade | $9.99 | one-time |
| SM One Expansions Bundle | $24.99 | one-time |

**What reviewers like**

- ✨ Excellent sound quality
- 🤩 Incredible features for free
- 👍 Easy to use interface
- 🎛️ Versatile sound design capabilities
- 🎵 Great for GarageBand integration

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔌 Issues with GarageBand integration
- 💸 In-app purchase problems
- 🔄 Presets not saving
- 📉 App appears abandoned

**Reported bugs**

- App crashes when loading saved presets
- App crashes when setting default sound
- AUv3 option disappears in GarageBand
- Inability to reload user patches without crashing
- Inability to purchase certain IAP packs

**Requested features**

- Fix in-app purchase issues
- Improve GarageBand AUv3 stability
- Enable saving of custom presets
- Address crashing when loading presets
- Fix note pitch issues


## Frequently asked questions

### Is PhaseDelayArray free?

PhaseDelayArray is free to download, with no in-app purchases.

### Is SynthMaster One for iPhone free?

SynthMaster One for iPhone is free to download, with in-app purchases available.

### Which has better reviews, PhaseDelayArray or SynthMaster One for iPhone?

SynthMaster One for iPhone is rated higher. PhaseDelayArray averages 4.5 out of 5 from 45 ratings, while SynthMaster One for iPhone averages 4.8 from 331 ratings.

### Do PhaseDelayArray or SynthMaster One for iPhone have ads?

Neither PhaseDelayArray nor SynthMaster One for iPhone shows ads.

### Which is updated more often, PhaseDelayArray or SynthMaster One for iPhone?

PhaseDelayArray ships an update every 2 months, and SynthMaster One for iPhone every 2 months. Most recently, PhaseDelayArray was updated on August 3, 2026 and SynthMaster One for iPhone on September 19, 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.*