Comparison

EchoSketch vs Seyfert

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

Head to head
About

EchoSketch

Shape delay and reverb effects in real-time with a playable X/Y performance surface. Explore four distinct delay types and multiple reverb options, with extensive parameter control for unique sound morphing. Works as a standalone app or an Audio Unit plugin.

Highlights
  • X/Y performance surface for real-time sound shaping
  • Four distinct delay types: digital, analog, reverse, ping-pong
  • Spring, plate, and hall convolution reverb
  • Modulation and tone control for echoes
  • HOLD, LIFT, FREEZE, and MOTION performance gestures
  • Standalone app and AUv3 plugin compatibility
Features
Read full description

EchoSketch turns delay and reverb into a live, playable instrument. Shape your sound in real time using a responsive X/Y performance surface designed for intuitive touch expression. At its core are four great-sounding delays: digital, analog, ping-pong, and reverse. The range for each parameter and the XY axes direction can be set independently, allowing you to easily morph between sounds. It works as an Audio Unit plugin or standalone — iOS or Mac. Comprehensive Delays • Digital (patterned after a legendary '80s rack delay), Analog (warm, with tape-style pitch glide), Reverse, and Left/Right Ping-Pong • Delay times can sync to tempo or be set in milliseconds • Feedback features delay-dependent tone shaping — bright for short delays and darker for long ones Convolution Reverb • Stereo or mono Spring, Plate, and Hall • Reverb path is separate from the delay (same as vintage tape echo units), so repeats don’t get washed out Modulation and Filter • Analog-style modulation for chorused, warbly pitch echoes • Tone control — darken or brighten delays, with a center detent for flat Designed for Hands-On Performance • HOLD / LIFT — leave the XY cursor in place, or touch the pad for momentary delay sounds • FREEZE — set the current feedback into an infinite loop and play over it • MOTION — record a gesture on the XY pad and loop it Presets and More • Presets are transferable between hosts • Two looks — light "Trail" and dark "Glow" • Works standalone with live audio or as an AUv3 plugin • Universal — iPad/iPhone also gets you the Mac version — one purchase • Mac: after installing, open EchoSketch once to use it as a plugin in your DAW • Works in AUM, AudioBus, GarageBand, Logic, and other AUv3 hosts

About

Seyfert

This music effect plugin creates unique echoes that orbit and revolve around the listener. It offers advanced control over pitch, depth, and tone for each echo, with a built-in reverb and EQ for a rich soundscape. It functions as a standalone app or an Audio Unit for music production software.

Highlights
  • Orbital echo generation
  • Spin and Doppler pitch-bend effects
  • 3D binaural imaging
  • Octave shimmer and transpose
  • Per-echo tone and drive
  • Echo-focused reverb and EQ
  • Standalone and AUv3 support
Features
Read full description

Seyfert is a delay unlike your others: every echo spawns at its own place in an orbit around you, and the whole constellation slowly revolves. Turn up Feedback and you don't just add repeats, you spawn more echoes into the orbit, from a single tight slap to a dense, spiralling cloud. Spin revolves the whole field around you. Doppler bends the echoes in pitch as they whirl toward and away. 3D wraps them around your head on headphones. Lift the repeats an octave into crystalline shimmer, drop them a sub-octave for weight, or detune them into a chorus. A lush reverb blooms around the echoes, never the dry signal, so your source stays clear while the repeats dissolve into space. Features: - Orbital echoes, where Feedback sets how many circle you - Spin, from a gentle drift to a full whirl - Doppler pitch-bend as the orbit turns - 3D binaural imaging for headphones - Shimmer and transpose, up or down one octave (octaves, fifths, sub-octaves) - Per-echo Trail tone, tape Wobble, and Drive - Lush reverb applied to the echoes - Full 5-band EQ on the wet signal - Orbit and Ping-Pong patterns, tempo sync - 18 factory presets, plus save your own - Standalone app and Audio Unit (AUv3) for GarageBand, AUM, Logic, and more No accounts, no tracking, no data collected. Everything stays on your device.

Screenshots

EchoSketch4 screens
Seyfert3 screens

Verdict

The call

The clearest difference is price: Seyfert at $1.99 against EchoSketch's $7.99. Seyfert also leads on iOS requirement (15.0 vs 17). On rating, ratings volume, update cadence and ads 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

EchoSketch costs $7.99 and Seyfert $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for EchoSketch against 5.0 for Seyfert. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 days. The most recent releases landed on September 29, 2026 and September 1, 2026 respectively.

Scorecard2 real differences · 8 level
EchoSketch versus Seyfert: the parameters behind the verdict, then further details
ParameterEchoSketchSeyfert
Price$7.99$1.99 — better
Rating5.0 (2 ratings)5.0 (2 ratings)
Positive reviews—100.0% of reviews
Number of ratings22
Update frequencyEvery 2 daysEvery 2 days
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS1715.0 — better
Further details — not scored
Size5 MB3 MB
Age rating4+4+
DeveloperAvi BortnickKonstantin Torsten Schutz

Customer experience

EchoSketch

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Seyfert

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EchoSketch

No in-app purchases

None

Seyfert

No in-app purchases

Questions

Is EchoSketch free?
EchoSketch costs $7.99, with no in-app purchases.
Is Seyfert free?
Seyfert costs $1.99, with no in-app purchases.
Which has better reviews, EchoSketch or Seyfert?
EchoSketch and Seyfert are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.
Do EchoSketch or Seyfert have ads?
Neither EchoSketch nor Seyfert shows ads.
Which is updated more often, EchoSketch or Seyfert?
EchoSketch ships an update every 2 days, and Seyfert every 2 days. Most recently, EchoSketch was updated on September 29, 2026 and Seyfert on September 1, 2026.

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