# KASPAR vs Phosphor 3

The clearest difference is price: Phosphor 3 at $5.99 against KASPAR's $19.99. KASPAR's advantage is ratings volume (91 vs 9). On rating, review sentiment, update cadence and ads there is nothing between them.

KASPAR costs $19.99 and Phosphor 3 $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.6 for KASPAR against 4.7 for Phosphor 3. That said, the two scores are not equally well evidenced: KASPAR has 91 ratings behind it against 9, so its average is the more settled of the two. Written reviews are what separate them: 75% of KASPAR's written reviews are positive against 79% of Phosphor 3's.

KASPAR ships an update every 16 months, Phosphor 3 every 11 months. The most recent releases landed on October 6, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | KASPAR | Phosphor 3 |
| --- | --- | --- |
| Price | $19.99 | **$5.99** |
| Rating | [4.6 (91 ratings)](https://appshunter.io/ios/app/kaspar/id1245045964/reviews) | **[4.7 (9 ratings)](https://appshunter.io/ios/app/phosphor-3/id1499115553/reviews)** |
| Number of ratings | **91** | 9 |
| Positive reviews | 75.0% of reviews | **78.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 11 months** |
| Monetization | Paid | Paid |
| Size | 64 MB | 27 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yonac Inc.](https://appshunter.io/developer/288670023) | [Audio Damage, Inc.](https://appshunter.io/developer/1248448317) |

## What reviewers say

### KASPAR

[App page](https://appshunter.io/ios/app/kaspar/id1245045964)

This powerful synthesizer app offers 8 polyphonic engines with extensive morphing, layering, and modulation capabilities. Create complex sounds with 24 oscillators, 8 filters, and built-in stereo effects. It integrates seamlessly with DAWs and other music apps.

**Highlights:** 8 polyphonic synth engines, Multi-Engine Automorphing, Extensive modulation system, Poly aftertouch support, 2 stereo FX busses, Audio Unit plugin integration, Inter-App Audio and Audiobus support

**In-app purchases:** none

**What reviewers like**

- ✨ Incredible power and depth
- 🔊 Amazing and unique sound quality
- 👍 Easy to use and intuitive UI
- 💡 Highly configurable and flexible
- 🎛️ Advanced sound shaping possibilities

**What reviewers complain about**

- 🐛 Occasional crashes and instability
- 💻 High CPU usage
- 🐞 Bugs in AUv3 implementation
- 🖼️ UI scaling issues in some DAWs
- 🤔 Presets can be uninspired or limited

**Reported bugs**

- Sound muted in solo mode for some synths
- Synth crashes when loading as AUv3 in Roland Zenbeats
- FX chain not working
- Program change messages not followed as AUv3 in Cubasis internal track
- UI does not scale to full screen in Cubasis 3

**Requested features**

- Add a step sequencer
- Improve preset variety and inspiration
- Fix AUv3 program change issues
- Address UI scaling problems in DAWs
- Implement MIDI out functionality


### 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 KASPAR free?

KASPAR costs $19.99, with no in-app purchases.

### Is Phosphor 3 free?

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

### Which has better reviews, KASPAR or Phosphor 3?

Phosphor 3 is rated higher. KASPAR averages 4.6 out of 5 from 91 ratings, while Phosphor 3 averages 4.7 from 9 ratings.

### Do KASPAR or Phosphor 3 have ads?

Neither KASPAR nor Phosphor 3 shows ads.

### Which is updated more often, KASPAR or Phosphor 3?

KASPAR ships an update every 16 months, and Phosphor 3 every 11 months. Most recently, KASPAR was updated on October 6, 2026 and Phosphor 3 on September 27, 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.*