Comparison

SynthStamp vs Retromulator

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

Head to head
About

SynthStamp

Explore vintage synthesizers with fully modeled engines and familiar interfaces. Patch, save, and share your creations across devices. Features real-time effects processing and models based on iconic hardware.

Highlights
  • Fully modeled vintage synth engines
  • Patchable semi-modular synthesizer
  • Circuit-bendable sampling keyboard
  • Real-time effects processing
  • Audio Unit (AUv3) plugin support
  • Cross-device preset sharing
Features
Read full description

The Vintage Synth Playground You Can Take Anywhere SynthStamp is a celebration of the history of electronic music, featuring fully modeled engines and familiar user interfaces behind some of the most desirable synthesizers. Tap and drag to patch, save your patch as a preset, and export presets to share across all of your devices including Mac, iPhone, and iPad. Yes that's right, iPhone. Take your sound anywhere. --- Stereo audio input for realtime effects processing Model based on the ARP 2600--finally on mobile Circuit-bendable model based on the SK-1--we haven't seen one either --- Choose Your Adventure 5001 Analog Synthesizer: dynamically patchable, semi-modular, monophonic analog synthesizer from the late '70s, with stereo preamplifier. A real idea factory, from classic analog synth leads to creative sound design, this synth is a tool for exploration and experimentation. You'll truly fall in love with the snappy, milky quality of the voltage-controlled filter. B500 Sampling Keyboard: circuit-bendable ROMpler from the mid '80s, with 4-voice polyphony, multi-channel note memory, and stereo sampler. Bend, sample, and compose melodies with this portable gem. Combine with continuous live sampling to create sounds that simply shouldn't exist. Flexibly Configurable, Infinitely Creative SynthStamp can be run as a standalone application or as an Audio Unit (AUv3) plugin inside supported DAWs, either as an Instrument with mono side chain input, or as a Music Effect on stereo/mono audio tracks for realtime processing, with full MIDI support. Presets can be imported and exported for easy sharing across devices, while on the same device, presets are stored in a common location across standalone and Audio Unit installations for shared access. Privacy Policy: https://themusicologygroup.com/privacy/

About

Retromulator

This app recreates legendary vintage synthesizers, samplers, and keyboards through accurate emulation. It functions as a standalone application or an AUv3 plugin, offering classic electronic music hardware sounds on iOS devices.

Highlights
  • Cycle-accurate hardware emulation
  • AUv3 plugin support
  • Standalone app functionality
  • Full MIDI control
  • ROM firmware loading
  • Background audio support
Features
Read full description

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 actual firmware, physical model, or sample data — delivering the unmistakable character of the hardware that defined electronic music from the early 80s through the 2000s. Version 1.6 adds the 88emu core, covering the Roland SC-88, SC-88VL, SC-88Pro, SC-8850 and SC-55mkII GS sound modules with their own Standard MIDI File player. — EMULATED CORES — VIRTUAL ANALOG SYNTHS Motorola DSP 56300 recreation (requires M1 iPad or iPhone 15 Pro or newer): • Access Virus A, B and C • Access Virus TI / TI2 / Snow • Clavia Nord Lead 2X • Waldorf microQ • Waldorf Microwave XT FM SYNTHESIS • Yamaha DX7 — original chip set emulation, based on 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. 3-voice polyphony, 8580 chip model with high-quality RESAMPLE, GoatTracker .sng / .ins bank loading (GTS3/4/5, GTI3/4/5) and .sid file import (PSID/RSID), full macro playback engine (wavetable, pulsetable, filtertable, speedtable) and live MIDI control of cutoff (CC 74), resonance (CC 71), pulse width (CC 75), vibrato (CC 1) and pitch bend. • Ayumi (AY-3-8910 / YM2149) — the PSG behind the ZX Spectrum, Amstrad CPC, Atari ST and MSX. Ayumi emulation by Peter Sovietov with the Ym2149Synth voice engine, 3-voice polyphony, switchable AY / YM engine, .ay patch loading, Factory and User banks, and 11 live CC controls. 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 • Full MIDI control: CC, mod wheel, expression, pitch bend • 8-point sinc interpolation for sample playback • Auto-slice drum mapping and global retuning via MIDI • ROM firmware loading from original hardware • Background audio, iCloud and Files app integration • Optimised interpreter compatible with the iOS App Store sandbox

Screenshots

SynthStamp4 screens
Retromulator1 screens

Verdict

The call

The clearest difference is price: SynthStamp at $4.99 against Retromulator's $9.99. On review sentiment, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

SynthStamp costs $4.99 and Retromulator $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

SynthStamp ships an update every 5 days, Retromulator every 3 days. The most recent releases landed on September 18, 2026 and September 20, 2026 respectively.

Scorecard1 real difference · 9 level
SynthStamp versus Retromulator: the parameters behind the verdict, then further details
ParameterSynthStampRetromulator
Price$4.99 — better$9.99
Rating4.4 (12 ratings) — better—
Positive reviews50.0% of reviews50.0% of reviews
Number of ratings12 — better—
Update frequencyEvery 5 daysEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, MaciPhone, iPad, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size39 MB67 MB
Age rating4+4+
DeveloperThe Musicology Group, Inc.DiscoDSP LLC

Customer experience

SynthStamp

All ratings12 ratings
Positive83.3%
Neutral8.3%
Negative8.3%
Written reviews14 reviews
Positive50.0%
Neutral14.3%
Negative35.7%

Retromulator

Written reviews6 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

SynthStamp

No in-app purchases

None

Retromulator

No in-app purchases

Questions

Is SynthStamp free?
SynthStamp costs $4.99, with no in-app purchases.
Is Retromulator free?
Retromulator costs $9.99, with no in-app purchases.
Do SynthStamp or Retromulator have ads?
Neither SynthStamp nor Retromulator shows ads.
Which is updated more often, SynthStamp or Retromulator?
SynthStamp ships an update every 5 days, and Retromulator every 3 days. Most recently, SynthStamp was updated on September 18, 2026 and Retromulator on September 20, 2026.

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