Comparison

Evil Otto vs Raven Synth

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

Head to head
About

Evil Otto

This audio effect applies simultaneous upward and downward compression across three frequency bands for detailed sound. It offers precise control over audio dynamics and includes features like sidechain input and real-time metering.

Highlights
  • Three-band OTT compression
  • Precise control parameters
  • Sidechain input for rhythmic effects
  • Real-time metering per band
  • Factory and user presets
  • Cross-platform preset compatibility
Features
Read full description

Evil Otto is a multiband OTT (Over-The-Top) compressor that applies simultaneous upward and downward compression across three frequency bands. The result is dense, hyper-detailed audio where peaks are controlled and quiet details are pushed forward — a sound heard across modern electronic music, pop, and hip-hop production. Features -- Three-Band OTT Compression Evil Otto splits your signal into low, mid, and high frequency bands and applies independent upward and downward compression to each. Quiet details come up, peaks come down, and each band can be tuned separately. -- Precise Control Without Complexity Fifteen parameters give you everything you need and nothing you don't: Depth, Time, independent Down and Up amounts, per-band thresholds, per-band output levels, and input/output gain. -- Sidechain Input Route an external signal to duck the compressed output for rhythmic pumping effects. A dedicated Listen mode lets you monitor the sidechain signal to verify routing. -- Real-Time Metering Nine meters show input levels, gain reduction, and output levels per band. The center meters display both downward compression and upward expansion relative to the threshold, so you can see exactly what the compressor is doing. -- Factory Presets Includes a library of starting points across a range of applications. Save and recall your own presets with the built-in preset browser. -- Cross-Platform Compatible User presets created on iOS work on macOS, Windows, and Linux. Sessions created in GarageBand or Logic on iOS will open the desktop version on macOS.

About

Raven Synth

This powerful wavetable synthesizer allows musicians to draw custom waveforms and morph between them. Sculpt evolving textures with a deep effects chain and performance-ready interface for sound design and live playing.

Highlights
  • Dual drawable oscillators with wavetable morphing
  • Utility oscillator with sub, ring mod, FM, noise, and harmonics
  • Classic ladder filter with 12/24dB slope
  • Dual ADSR envelopes for filter and amp
  • Dual LFOs with drawable waveforms and modulation slots
  • Full effects chain including delay, reverb, chorus, and distortion
  • AUv3 instrument and MIDI support
Features
Read full description

RAVEN - Wavetable Morphing Synth RAVEN is a deep, expressive wavetable-morphing synthesizer designed for evolving textures and sculpted sound on iOS. Built for musicians, producers, and sound designers, Raven delivers drawable waveforms, real-time morphing, and a full effects chain in a clean, performance-ready interface - whether you're crafting pads, designing sounds, or playing live. Key Features: Dual drawable oscillators with wavetable morphing Utility oscillator (sub, ring mod, FM, noise, harmonics) Classic ladder filter with 12/24dB slope Dual ADSR envelopes (Filter + Amp) Dual LFOs with drawable waveforms, fade-in (up to 20s), and flexible modulation slots 12-band parametric EQ Delay, reverb, chorus, and distortion FX 56 factory presets with QR code sharing Touch-optimized performance controls AUv3 instrument support CoreMIDI & Bluetooth MIDI Designed for iPhone and iPad Raven is intentionally deep - every control shapes the sound. Draw your waveforms. Morph between them. Sculpt everything in between. Designed for exploration. Built for expression.

Screenshots

Evil Otto1 screens
Raven Synth4 screens

Verdict

The call

The clearest difference is review sentiment: Raven Synth at 100% against Evil Otto's 50%. Raven Synth also leads on rating (5.0 vs 4.5). Evil Otto's advantage is price ($4.99 vs $6.99) and iOS requirement (12.0 vs 17.0). On ratings volume, 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

Evil Otto costs $4.99 and Raven Synth $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Raven Synth holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 5 respectively. Written reviews point the same way: 50% of Evil Otto's written reviews are positive against 100% of Raven Synth's.

Scorecard4 real differences · 6 level
Evil Otto versus Raven Synth: the parameters behind the verdict, then further details
ParameterEvil OttoRaven Synth
Price$4.99 — better$6.99
Rating4.5 (4 ratings)5.0 (5 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings45 — better
Update frequency—Every 4 days
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better17.0
Further details — not scored
Size60 MB10 MB
Age rating4+4+
DeveloperAudio Damage, Inc.Steffen Mølgaard Larsen

Customer experience

Evil Otto

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews4 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

Raven Synth

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Evil Otto

No in-app purchases

None

Raven Synth

No in-app purchases

Questions

Is Evil Otto free?
Evil Otto costs $4.99, with no in-app purchases.
Is Raven Synth free?
Raven Synth costs $6.99, with no in-app purchases.
Which has better reviews, Evil Otto or Raven Synth?
Raven Synth is rated higher. Evil Otto averages 4.5 out of 5 from 4 ratings, while Raven Synth averages 5.0 from 5 ratings.
Do Evil Otto or Raven Synth have ads?
Neither Evil Otto nor Raven Synth shows ads.

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