# Viking Synth vs RRS Ivoks

The clearest difference is price: RRS Ivoks at Free against Viking Synth's $3.99. RRS Ivoks also leads on update cadence (fortnightly vs every 4 months) and iOS requirement (10.0 vs 12.0). Viking Synth's advantage is in-app purchases (none vs 1) and rating (4.7 vs 4.4). On review sentiment, ratings volume, ads and device support there is nothing between them.

RRS Ivoks is free to download; Viking Synth costs $3.99 up front. RRS Ivoks sells 1 one-off in-app purchase. Viking Synth asks for nothing beyond the download.

Viking Synth holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 41 and 46 respectively. Written reviews point the same way: 71% of Viking Synth's written reviews are positive against 63% of RRS Ivoks's.

Viking Synth ships an update every 4 months, RRS Ivoks fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Viking Synth | RRS Ivoks |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[4.7 (41 ratings)](https://appshunter.io/ios/app/viking-synth/id1085274012/reviews)** | [4.4 (46 ratings)](https://appshunter.io/ios/app/rrs-ivoks/id6443504248/reviews) |
| Number of ratings | 41 | **46** |
| Positive reviews | **71.2% of reviews** | 63.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 11 MB | 19 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blamsoft, Inc.](https://appshunter.io/developer/1051938244) | [RRS, OOO](https://appshunter.io/developer/1486125568) |

## 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


### RRS Ivoks

[App page](https://appshunter.io/ios/app/rrs-ivoks/id6443504248)

This app emulates analog synthesizers, offering a range of sound shaping tools including oscillators, filters, and amplifiers. It supports AUv3 hosting for integration with music production apps and provides extensive MIDI control.

**Highlights:** Analog Emulation, AUv3 Compatible, Dual Oscillators, Filter Block with ADSR, Amplifier Block with ADSR, Modulation (LFO) Controls, MIDI CC Implementation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS Ivoks Unlimited | $8.99 | one-time |


## Frequently asked questions

### Is Viking Synth free?

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

### Is RRS Ivoks free?

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

### Which has better reviews, Viking Synth or RRS Ivoks?

Viking Synth is rated higher. Viking Synth averages 4.7 out of 5 from 41 ratings, while RRS Ivoks averages 4.4 from 46 ratings.

### Do Viking Synth or RRS Ivoks have ads?

Neither Viking Synth nor RRS Ivoks shows ads.

### Which is updated more often, Viking Synth or RRS Ivoks?

Viking Synth ships an update every 4 months, and RRS Ivoks fortnightly. Most recently, Viking Synth was updated on October 26, 2026 and RRS Ivoks on October 24, 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.*