# Viking Synth vs dspMixFx UR

The clearest difference is price: dspMixFx UR at Free against Viking Synth's $3.99. Viking Synth's advantage is rating (4.7 vs 3.7) and review sentiment (71% vs 34%). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

dspMixFx UR is free to download; Viking Synth costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Viking Synth holds the better App Store score, 4.7 against 3.7. Both are backed by a comparable volume of ratings — 41 and 10 respectively. Written reviews point the same way: 71% of Viking Synth's written reviews are positive against 34% of dspMixFx UR's.

Viking Synth ships an update every 4 months, dspMixFx UR every 13 months. The most recent releases landed on October 26, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Viking Synth | dspMixFx UR |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.7 (41 ratings)](https://appshunter.io/ios/app/viking-synth/id1085274012/reviews)** | [3.7 (10 ratings)](https://appshunter.io/ios/app/dspmixfx-ur-c/id1471984454/reviews) |
| Number of ratings | **41** | 10 |
| Positive reviews | **71.2% of reviews** | 33.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 13 months |
| Monetization | Paid | **Free** |
| Size | 11 MB | 57 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blamsoft, Inc.](https://appshunter.io/developer/1051938244) | [Yamaha Corporation](https://appshunter.io/developer/353469356) |

## What reviewers say

### 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


### dspMixFx UR

[App page](https://appshunter.io/ios/app/dspmixfx-ur-c/id1471984454)

This application provides control over DSP features and built-in effects for compatible audio interfaces on iOS devices. It allows for latency-free monitoring and streaming mixes for music applications, utilizing effects like reverb and channel strips.

**Highlights:** Control DSP features on URX-C/UR-C series, DSP mixer control, Built-in DSP effects control, Latency-free monitoring, Streaming mix creation, Compatible with specific Yamaha audio interfaces

**In-app purchases:** none


## Frequently asked questions

### Is Viking Synth free?

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

### Is dspMixFx UR free?

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

### Which has better reviews, Viking Synth or dspMixFx UR?

Viking Synth is rated higher. Viking Synth averages 4.7 out of 5 from 41 ratings, while dspMixFx UR averages 3.7 from 10 ratings.

### Do Viking Synth or dspMixFx UR have ads?

Neither Viking Synth nor dspMixFx UR shows ads.

### Which is updated more often, Viking Synth or dspMixFx UR?

Viking Synth ships an update every 4 months, and dspMixFx UR every 13 months. Most recently, Viking Synth was updated on October 26, 2026 and dspMixFx UR on October 22, 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.*