# SoundPrism vs Viking Synth

The clearest difference is price: SoundPrism at Free against Viking Synth's $3.99. SoundPrism also leads on review sentiment (85% vs 71%) and iOS requirement (9.0 vs 12.0). Viking Synth's advantage is in-app purchases (none vs 10) and rating (4.7 vs 4.2). On ratings volume, update cadence, ads and device support there is nothing between them.

SoundPrism is free to download; Viking Synth costs $3.99 up front. SoundPrism sells 10 one-off in-app purchases. Viking Synth asks for nothing beyond the download.

Viking Synth holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 74 and 41 respectively. Written reviews complicate that: 85% of SoundPrism's written reviews are positive against 71% of Viking Synth's, so the app with the better star average is not the one people write more warmly about.

SoundPrism ships an update every 3 months, Viking Synth every 4 months. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | SoundPrism | Viking Synth |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [4.2 (74 ratings)](https://appshunter.io/ios/app/soundprism/id386833491/reviews) | **[4.7 (41 ratings)](https://appshunter.io/ios/app/viking-synth/id1085274012/reviews)** |
| Number of ratings | **74** | 41 |
| Positive reviews | **84.6% of reviews** | 71.2% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 136 MB | 11 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grace Cloud GmbH](https://appshunter.io/developer/1542330108) | [Blamsoft, Inc.](https://appshunter.io/developer/1051938244) |

## What reviewers say

### SoundPrism

[App page](https://appshunter.io/ios/app/soundprism/id386833491)

Create beautiful music immediately with intuitive controls and unique pitch visualization. Compose melodies, tone, and chord patterns effortlessly, even without prior knowledge. Easily make ringtones, record, and email your creations, or play along to other music apps.

**Highlights:** Intuitive music composition, Unique pitch visualization, Create ringtones, Record and email compositions, Background audio playback

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Guitar Sounds | $0.99 | one-time |
| Trance Soundpack SoundPrism | $0.99 | one-time |
| Choir Soundpack | $0.99 | one-time |
| Organ SoundPack | $0.99 | one-time |
| Airy Pad Sound Pack | $0.99 | one-time |
| Euro Synth Sound Pack | $0.99 | one-time |
| Lead Synth Sound Pack | $0.99 | one-time |
| Snow Skin | $1.99 | one-time |
| Midnight Skin | $1.99 | one-time |
| Sound Bundle 1 | $1.99 | one-time |

**What reviewers like**

- 👍 Intuitive and easy to use
- 🎨 Visually appealing interface
- 🎶 Produces great-sounding music
- 🧠 Helpful for learning music theory
- 🤩 Fun and creative experience

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues
- 🔊 Limited sound selection
- 💰 Expensive in-app purchases
- 🔇 No background playback or looping
- 🔍 Confusing menu navigation

**Reported bugs**

- Crashes on newer iOS devices
- Multitouch issues causing app to freeze
- Playback problems and audio glitches
- Inconsistent performance across different devices

**Requested features**

- Add more sound packs and instruments
- Implement recording and editing capabilities
- Allow for more customization and control over sounds
- Improve MIDI integration and compatibility
- Provide an upgrade path from free to pro version


### Viking Synth

[App page](https://appshunter.io/ios/app/viking-synth/id1085274012)

This app emulates a classic monophonic analog synthesizer with advanced DSP technology. It features three variable wave oscillators, dual ladder filters, an LFO, and two modulation busses for versatile sound design.  An intuitive interface and extensive preset library make it ideal for creating thick bass and rich lead sounds.

**Highlights:** Three continuously variable wave oscillators, Dual ladder filters (Lowpass/Highpass), Multi-wave LFO, Two modulation busses, Intuitive user interface with expandable controls, 228 presets including Bass, Lead, and Synthwave, State-of-the-art DSP for authentic sound

**In-app purchases:** none

**What reviewers like**

- 🎶 Great sound quality
- 💡 Versatile sound options
- 💰 Excellent value (free)
- 💻 Lightweight and efficient
- 🎹 Good for learning synthesis

**What reviewers complain about**

- ❓ Preset issues
- 🔌 Not a standalone app
- 🐛 Occasional crashes
- 💾 Settings not saving
- 🤷‍♂️ Difficult to find/use

**Reported bugs**

- Presets not showing up
- Presets disappear
- App not showing in AUv3 menu
- Settings not saving after iOS 14 update
- Crashes when opening presets browser

**Requested features**

- More subtle drive mode
- Categorized preset browser
- Polyphony option
- Dark mode
- More apps from developer


## Frequently asked questions

### Is SoundPrism free?

SoundPrism is free to download, with in-app purchases available.

### Is Viking Synth free?

Viking Synth costs $3.99, with no in-app purchases.

### Which has better reviews, SoundPrism or Viking Synth?

Viking Synth is rated higher. SoundPrism averages 4.2 out of 5 from 74 ratings, while Viking Synth averages 4.7 from 41 ratings.

### Do SoundPrism or Viking Synth have ads?

Neither SoundPrism nor Viking Synth shows ads.

### Which is updated more often, SoundPrism or Viking Synth?

SoundPrism ships an update every 3 months, and Viking Synth every 4 months. Most recently, SoundPrism was updated on October 22, 2026 and Viking Synth on October 20, 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.*