# Xkey Plus vs Synclavier Go! App and Plugin

The clearest difference is review sentiment: Synclavier Go! App and Plugin at 81% against Xkey Plus's 36%. Synclavier Go! App and Plugin also leads on rating (4.7 vs 2.9) and update cadence (every 3 weeks vs every 3 months). Xkey Plus's advantage is price (Free vs $19.99) and iOS requirement (9.3 vs 12.0). On ads and in-app purchases there is nothing between them.

Xkey Plus is free to download; Synclavier Go! App and Plugin costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Synclavier Go! App and Plugin holds the better App Store score, 4.7 against 2.9. Both are backed by a comparable volume of ratings — 13 and 52 respectively. Written reviews point the same way: 36% of Xkey Plus's written reviews are positive against 81% of Synclavier Go! App and Plugin's.

Xkey Plus ships an update every 3 months, Synclavier Go! App and Plugin every 3 weeks. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Xkey Plus | Synclavier Go! App and Plugin |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | [2.9 (13 ratings)](https://appshunter.io/ios/app/xkey-plus/id698087460/reviews) | **[4.7 (52 ratings)](https://appshunter.io/ios/app/synclavier-go-app-and-plugin/id1378108734/reviews)** |
| Number of ratings | 13 | **52** |
| Positive reviews | 35.7% of reviews | **81.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 9 MB | 94 MB |
| Requires iOS | **9.3** | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ESI Audiotechnik GmbH](https://appshunter.io/developer/1627424644) | [Synclavier Digital Corporation Ltd](https://appshunter.io/developer/1200334789) |

## What reviewers say

### Xkey Plus

[App page](https://appshunter.io/ios/app/xkey-plus/id698087460)

This app enhances the functionality of ESI Xkey musical keyboards on mobile devices. It allows users to update firmware, customize velocity curves, and configure key sensitivity and timings for an advanced user experience.

**Highlights:** Check for new Xkey firmware, Velocity curves editor, Configure Xkey sensitivity & timings, Access all Xkey parameters, Configure key & button assignments, Access Xkey documentation & support

**Features:** macOS Compatibility

**In-app purchases:** none


### Synclavier Go! App and Plugin

[App page](https://appshunter.io/ios/app/synclavier-go-app-and-plugin/id1378108734)

Experience the legendary Synclavier sound on your mobile device. This app offers a powerful vintage synthesizer and sampler with modern MPE and AUv3 compatibility, allowing for deep sound design and integration with iOS DAWs.

**Highlights:** Vintage synthesizer and sampler, AUv3 client for iOS DAWs, MPE compatibility, 12 Partial Timbres, 16-track mixing console, Artist Preset Libraries, Sample Library

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Xkey Plus free?

Xkey Plus is free to download, with no in-app purchases.

### Is Synclavier Go! App and Plugin free?

Synclavier Go! App and Plugin costs $19.99, with no in-app purchases.

### Which has better reviews, Xkey Plus or Synclavier Go! App and Plugin?

Synclavier Go! App and Plugin is rated higher. Xkey Plus averages 2.9 out of 5 from 13 ratings, while Synclavier Go! App and Plugin averages 4.7 from 52 ratings.

### Do Xkey Plus or Synclavier Go! App and Plugin have ads?

Neither Xkey Plus nor Synclavier Go! App and Plugin shows ads.

### Which is updated more often, Xkey Plus or Synclavier Go! App and Plugin?

Xkey Plus ships an update every 3 months, and Synclavier Go! App and Plugin every 3 weeks. Most recently, Xkey Plus was updated on October 10, 2026 and Synclavier Go! App and Plugin on October 13, 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.*