Comparison

Viking Synth vs Sonic Synth

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Viking Synth

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
Read full description

Viking Synth is an authentic emulation of a classic monophonic analog synthesizer. It has three continuously variable wave oscillators, two ladder filters with a Dual Lowpass or Highpass/Lowpass configuration, a multi-wave LFO, and two modulation busses. Viking Synth uses state of the art DSP technology to accurately reproduce the sound of the hardware. You get a desktop quality plug-in at an iOS friendly price. Viking Synth is an Audio Unit Extension Instrument (AUv3) that works as a plug-in inside host apps. Just open up your favorite host that supports Audio Unit Instruments and select it from the list of available Audio Units. Compatible with GarageBand, Cubasis, Auria, BeatMaker, AudioBus, AUM, Modstep, and more. The user interface of Viking Synth is designed for quick and intuitive control. Knobs and sliders expand during tweaking and are designed so the current value isn't hidden below your finger. The six pages divide the synth into logical sections that can be accessed quickly. The filter display acts as an XY pad for controlling cutoff and resonance. Simply double tap a knob or slider to reset it to its default value. Presets Viking Synth comes with 228 presets in the categories Bass, Bright Lead, Electro Bass, FX, Percussive Lead, Soft Lead, and Synthwave. The synth excels at thick bass and rich lead sounds. The 50 Electro Bass and 50 Synthwave presets were designed by renowned sound designer eXode. Presets work perfectly with GarageBand, Cubasis, and AUM. Oscillators At the heart of Viking are three adjustable wave oscillators. The continuously variable waveform knob gives the oscillators a unique sound that can’t be achieved with the fixed waveforms found in most synths. A noise oscillator provides three types of noise, one specifically modeled after the hardware. Modulation Two modulation busses and an LFO provide flexible modulation capabilities. All of the options hidden deep in menus on the hardware are immediately accessible with one tap. Filters The filters are classic transistor ladder filters modeled meticulously. Two DSP varieties are available allowing for either reduced CPU load or soft clipping plus three additional overdriven modes. The number of poles is adjustable for a wider range of filter sounds. Compare Viking to other synths: – Viking’s oscillators are free running, not sampled, wavetable based, or generated from a zero point – Viking’s oscillators use advanced techniques to avoid aliasing – Viking’s oscillators have instability, which is controllable through the tuning drift control – Viking’s nonlinear filter uses circuit modeling and provides soft clipping

About

Sonic Synth

Create a wide variety of sounds with this FM synthesizer app. It features three independent oscillators, each capable of generating four unique waveforms, and offers a responsive touch keyboard for real-time performance. Enjoy high-quality audio with a 44100 Hz sample rate.

Highlights
  • 3 independent oscillators
  • 4 waveform types per oscillator
  • Volume, modulation, tone, and detune controls
  • Envelope filters (attack, sustain, release)
  • Multitouch support
  • Responsive piano keyboard
  • Core MIDI support
Features
Read full description

Sonic Synth is very capable FM Synthesizer app with 3 oscillators. Every oscillator is independent and can generate 4 wave forms. The app works with 44100 Hz sample rate so the sound quality is great. Core MIDI - support for MIDI keyboards via USB The touch keyboard is also very responsive and dynamic - feels like a real instrument. Keys are big enough. The last wave form is our secret algorithm for string sound also generated by the oscillators. Variety of sounds can be created and even changed real time while you are playing using the setting of the 3 oscillators of the synthesizer. Sonic Synth main features:
- 3 oscillators
- 4 wave form types for every oscillator
- volume, modulation, tone and detune for every oscillator
- envelope filters (attack sustain release)
- multitouch
- fast and usable piano keyboard 
You can now use your phone or tablet as a recording instrument.

Screenshots

Viking Synth4 screens
Sonic Synth3 screens

Verdict

The call

The clearest difference is review sentiment: Viking Synth at 71% against Sonic Synth's 0%. Viking Synth also leads on rating (4.7 vs 3.0) and ratings volume (41 vs 1). Sonic Synth's advantage is price ($1.99 vs $3.99). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Viking Synth costs $3.99 and Sonic Synth $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Viking Synth holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Viking Synth has 41 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 71% of Viking Synth's written reviews are positive against 0% of Sonic Synth's.

UpkeepUpdate frequency

Viking Synth ships an update every 4 months, Sonic Synth every 6 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 6 level
Viking Synth versus Sonic Synth: the parameters behind the verdict, then further details
ParameterViking SynthSonic Synth
Price$3.99$1.99 — better
Rating4.7 (41 ratings) — better3.0 (1 ratings)
Positive reviews71.2% of reviews — better0.0% of reviews
Number of ratings41 — better1
Update frequencyEvery 4 months — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size11 MB1 MB
Age rating4+4+
DeveloperBlamsoft, Inc.Aleksandar Mlazev

Customer experience

Viking Synth

All ratings42 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews66 reviews
Positive71.2%
Neutral10.6%
Negative18.2%

Sonic Synth

All ratings1 ratings
Positive0.0%
Neutral100.0%
Negative0.0%
Written reviews4 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Viking Synth

Reported bugs

6 issues
  • Presets not showing up
  • Presets disappear
  • App not showing in AUv3 menu
  • Settings not saving after iOS 14 update
  • Crashes when opening presets browser
Show 1 more
  • Saved presets not loading

Requested features

5 requests
  • More subtle drive mode
  • Categorized preset browser
  • Polyphony option
  • Dark mode
  • More apps from developer

Sonic Synth

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Viking Synth

No in-app purchases

None

Sonic Synth

No in-app purchases

Questions

Is Viking Synth free?
Viking Synth costs $3.99, with no in-app purchases.
Is Sonic Synth free?
Sonic Synth costs $1.99, with no in-app purchases.
Which has better reviews, Viking Synth or Sonic Synth?
Viking Synth is rated higher. Viking Synth averages 4.7 out of 5 from 41 ratings, while Sonic Synth averages 3.0 from 1 ratings.
Do Viking Synth or Sonic Synth have ads?
Neither Viking Synth nor Sonic Synth shows ads.
Which is updated more often, Viking Synth or Sonic Synth?
Viking Synth ships an update every 4 months, and Sonic Synth every 6 months. Most recently, Viking Synth was updated on October 26, 2026 and Sonic Synth on October 24, 2026.

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