# Metric vs Retromulator

The clearest difference is price: Metric at Free against Retromulator's $19.99. Retromulator's advantage is in-app purchases (none vs 1) and update cadence (every 3 days vs monthly). On ads and device support there is nothing between them.

Metric is free to download; Retromulator costs $19.99 up front. Metric sells 1 one-off in-app purchase. Retromulator asks for nothing beyond the download.

Metric ships an update monthly, Retromulator every 3 days. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Metric | Retromulator |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | — | Paid |
| Best chart rank | — | **#189** |
| Size | 12 MB | 83 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GITC](https://appshunter.io/developer/1839082765) | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) |

## What reviewers say

### Metric

[App page](https://appshunter.io/ios/app/metric/id6757522050)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $9.99 | one-time |


### Retromulator

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

**Currently charting:** #189 Top Paid · Music (US App Store)

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 Metric free?

Metric is free to download, with in-app purchases available.

### Is Retromulator free?

Retromulator costs $19.99, with no in-app purchases.

### Do Metric or Retromulator have ads?

Neither Metric nor Retromulator shows ads.

### Which is updated more often, Metric or Retromulator?

Metric ships an update monthly, and Retromulator every 3 days. Most recently, Metric was updated on October 11, 2026 and Retromulator on October 18, 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.*