# SynthStamp vs Retromulator

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.

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

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.

## The numbers

| Metric | SynthStamp | Retromulator |
| --- | --- | --- |
| Price | **$4.99** | $9.99 |
| Rating | **[4.4 (12 ratings)](https://appshunter.io/ios/app/synthstamp/id6760490718/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 3 days** |
| Monetization | Paid | Paid |
| Size | 39 MB | 67 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Musicology Group, Inc.](https://appshunter.io/developer/1061725506) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### SynthStamp

[App page](https://appshunter.io/ios/app/synthstamp/id6760490718)

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:** Vision Pro support

**In-app purchases:** none


### Retromulator

[App page](https://appshunter.io/ios/app/retromulator/id6764767449)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*