Electron ECHO mini piano vs Retromulator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Electron ECHO mini piano
Experience a simulated musical toy from the 1980s, complete with authentic synthesized sounds and optional battery depletion detuning. Learn classic and modern melodies with a free songbook and enjoy features like reverb and octave shifts.
- Simulated 1980s musical toy
- Authentic synthesizer sound
- Optional battery depletion detuning
- Free songbook with melodies
- Reverb effect
- Octave down shift
- Sub-oscillator for bass tones
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Electron ECHO mini piano is a simulated version of a popular musical toy from the 1980's. Just like the real thing, it (optionally) detunes as your battery depletes! Includes a FREE songbook with instructions for classic and modern melodies and an extensive essay on the original device. IT'S A SYNTH Modeled after the original device sound through wave shape analysis. No cheap samples, it's a synthesizer! FREE SONGBOOK Includes free songbook. Learn how to play your favorite melodies. More songs added in future updates, free of charge! FOUR SKIN COLORS Choose your favorite color from four available skins! REVERB EFFECT Pretend you're playing in a large hall! BACKGROUND AUDIO Play along with music from iTunes, Spotify or any other music app you might use! OCTAVE DOWN Too pitchy sounding for ya? With the flip of a switch you can tune the keyboard down by one full octave! SUB-OSCILLATOR Want to get a bit of electro bass going? Optionally add a square wave sound tuned one octave below the notes you play! Get your retro on, get back to the 80's with Electron ECHO mini piano NOW!
Retromulator
This app recreates the sound of legendary vintage synthesizers, samplers, and keyboards through authentic low-level emulation. It brings classic hardware sound engines to your device, allowing for detailed sound design and performance.
- Authentic low-level hardware emulation
- Virtual analog synths
- FM synthesis engines
- GM/GS sound modules
- Chiptune sound emulation
- Organ and electric piano emulations
- AUv3 plugin support
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Retromulator is a multi-core retro hardware emulation app and AUv3 plug-in that brings legendary synthesizer, sampler, and keyboard cores back to life through authentic low-level emulation. Each core runs its original firmware, a clean-room controller written from the behaviour of the hardware, a physical model or sample data — delivering the unmistakable character of the hardware that defined electronic music from the early 80s through the 2000s. — EMULATED CORES — VIRTUAL ANALOG SYNTHS • Nordic — virtual analog synth after the Nord Lead 1 by discoDSP, with its own panel, factory banks, Nord Lead SysEx import and its own AUv3 • Nordic 2 — Nord Lead 2 recreation by discoDSP, clean-room coded with no firmware, 64 voices, Performance mode with four slots, Nord Lead 2 and N2X bank loading and its own AUv3 Firmware-level chip emulation, enabled with the 56k cores option (requires M1 iPad or iPhone 15 Pro or newer): • Access Virus A, B and C — Motorola DSP 56300 recreation • Access Virus TI / TI2 / Snow — Motorola DSP 56300 recreation • Waldorf microQ — Motorola DSP 56300 recreation • Waldorf Microwave XT — Motorola DSP 56300 recreation • Roland JP-8000 and JP-8080 — JE-8086 core by Giulio Zausa ANALOG SYNTHS • Oberheim Matrix-1000 — clean-room controller, no firmware needed, driving six CEM3396 voice models, with a MIDI CC for each of the 96 patch parameters and LFO sync to the host tempo or MIDI clock • MiniD — discoDSP's analog core in the layout of the classic three-oscillator monosynth, voiced from measurements of analog hardware, with a ladder filter, Poly, Unison and Double voicing, 49 factory presets and its own AUv3 • OB-Xd 2 — discoDSP's synth after the Oberheim OB-X, OB-Xa and OB-8, with its own panel, 24 factory banks and its own AUv3 FM SYNTHESIS • Yamaha DX7 — clean-room controller, no firmware needed, driving the original EGS and OPS chip models from VDX7 by Charles Chiaccona • Yamaha OPL3 — Nuked OPL3 cycle-accurate FM by Nuke.YKT GM / GS SOUND MODULES • 88emu — Roland SC-88, SC-88VL, SC-88Pro, SC-8850 and SC-55mkII boards, emulation by Giulio Zausa, with GS variation, map and rhythm handling, program and drum kit names read straight from the board ROM, 16-part multitimbral operation, and a Standard MIDI File player with offline rendering to WAV or AAC. CHIPTUNE • Commodore 64 SID 6581/8580 — based on reSID, with GoatTracker .sng / .ins banks, .sid file import (PSID/RSID), the macro playback engine and MIDI control of cutoff, resonance, pulse width and vibrato. • Ayumi (AY-3-8910 / YM2149) — the PSG behind the ZX Spectrum, Amstrad CPC, Atari ST and MSX. Ayumi emulation by Peter Sovietov, with a switchable AY / YM engine and .ay patch loading. ORGAN • Hammond B3 with Leslie speaker — OpenB3, based on the setBfree engine by Michele Perrone. Upper, lower and pedal drawbars, percussion, vibrato and chorus, overdrive, reverb, three Leslie cabinets, keyboard split and .fxp presets ELECTRIC PIANO AND SAMPLER • Wurlitzer 200A — OpenWurli physical modelling by hal0zer0 (Rust ported to C++ by discoDSP) • Akai S1000 — SFZero sample engine by Steve Folta, with Bliss Sampler support and resampling engine by discoDSP (SF2 / SFZ / ZBP / ZBB) — KEY FEATURES — • Native AUv3 plug-in for AUM, Cubasis, GarageBand, Logic Pro and more • Standalone app for iPhone and iPad • Racks: up to 8 cores in one instance, each with gain, pan, mute, solo, octave and key split • FX chain: AUv3 and Apple effects on the master output • Full MIDI control: CC, mod wheel, expression, pitch bend • ROM firmware loading from original hardware • Background audio, iCloud and Files app integration • Optimised interpreter compatible with the iOS App Store sandbox • Boards: hardware-style control panels for 14 cores, with host parameter linking and NRPN input • MIDI out to the host or to a MIDI device, and an Editor Only mode that runs a board without the sound engine or firmware, to edit the original hardware
Screenshots
Verdict
The clearest difference is price: Electron ECHO mini piano at $1.99 against Retromulator's $29.99. Electron ECHO mini piano also leads on review sentiment (93% vs 67%) and iOS requirement (7.0 vs 16.0). Retromulator's advantage is update cadence (every 2 days vs every 2 months). On rating, ratings volume, ads and in-app purchases 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
Electron ECHO mini piano costs $1.99 and Retromulator $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Electron ECHO mini piano against 5.0 for Retromulator. Both are backed by a comparable volume of ratings — 11 and 4 respectively. Written reviews are what separate them: 93% of Electron ECHO mini piano's written reviews are positive against 67% of Retromulator's.
Electron ECHO mini piano ships an update every 2 months, Retromulator every 2 days. The most recent releases landed on November 6, 2026 and November 12, 2026 respectively.
| Parameter | Electron ECHO mini piano | Retromulator |
|---|---|---|
| Price | $1.99 — better | $29.99 |
| Rating | 5.0 (11 ratings) | 5.0 (4 ratings) |
| Positive reviews | 93.3% of reviews — better | 66.7% of reviews |
| Number of ratings | 11 — better | 4 |
| Update frequency | Every 2 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 7.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 6 MB | 144 MB |
| Age rating | 4+ | 4+ |
| Developer | Emil Korngold | DiscoDSP LLC |
Customer experience
Electron ECHO mini piano
Retromulator
In-app purchases
Electron ECHO mini piano
No in-app purchases
Retromulator
No in-app purchases
Questions
Is Electron ECHO mini piano free?
Is Retromulator free?
Which has better reviews, Electron ECHO mini piano or Retromulator?
Do Electron ECHO mini piano or Retromulator have ads?
Which is updated more often, Electron ECHO mini piano or Retromulator?
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