# Xkey Plus vs FabFilter Twin 3

The clearest difference is review sentiment: FabFilter Twin 3 at 86% against Xkey Plus's 36%. FabFilter Twin 3 also leads on rating (4.6 vs 2.9) and ratings volume (42 vs 13). Xkey Plus's advantage is price (Free vs $24.99) and update cadence (every 3 months vs every 19 months). On ads, in-app purchases and device support there is nothing between them.

Xkey Plus is free to download; FabFilter Twin 3 costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

FabFilter Twin 3 holds the better App Store score, 4.6 against 2.9. Both are backed by a comparable volume of ratings — 13 and 42 respectively. Written reviews point the same way: 36% of Xkey Plus's written reviews are positive against 86% of FabFilter Twin 3's.

Xkey Plus ships an update every 3 months, FabFilter Twin 3 every 19 months. The most recent releases landed on June 6, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Xkey Plus | FabFilter Twin 3 |
| --- | --- | --- |
| Price | **Free** | $24.99 |
| Rating | [2.9 (13 ratings)](https://appshunter.io/ios/app/xkey-plus/id698087460/reviews) | **[4.6 (42 ratings)](https://appshunter.io/ios/app/fabfilter-twin-3/id1671810470/reviews)** |
| Number of ratings | 13 | **42** |
| Positive reviews | 35.7% of reviews | **86.2% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 19 months |
| Monetization | **Free** | Paid |
| Size | 9 MB | 11 MB |
| Requires iOS | **9.3** | 14.0 |
| Devices | iPad | iPad |
| Age rating | 4+ | 4+ |
| Developer | [ESI Audiotechnik GmbH](https://appshunter.io/developer/1627424644) | [FabFilter](https://appshunter.io/developer/421796789) |

## 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


### FabFilter Twin 3

[App page](https://appshunter.io/ios/app/fabfilter-twin-3/id1671810470)

This powerful virtual analog synthesizer offers a vast array of sound-shaping tools, including multiple oscillators, filters, and a comprehensive modulation system. Create a wide range of synth sounds with an intuitive interface and a rich factory preset library.

**Highlights:** Four flexible oscillators, Four vintage-style filters, Extensive modulation system, All-new FX section, Arpeggiator with groove controls, Full-featured preset browser, Analog-modelled drift

**In-app purchases:** none


## Frequently asked questions

### Is Xkey Plus free?

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

### Is FabFilter Twin 3 free?

FabFilter Twin 3 costs $24.99, with no in-app purchases.

### Which has better reviews, Xkey Plus or FabFilter Twin 3?

FabFilter Twin 3 is rated higher. Xkey Plus averages 2.9 out of 5 from 13 ratings, while FabFilter Twin 3 averages 4.6 from 42 ratings.

### Do Xkey Plus or FabFilter Twin 3 have ads?

Neither Xkey Plus nor FabFilter Twin 3 shows ads.

### Which is updated more often, Xkey Plus or FabFilter Twin 3?

Xkey Plus ships an update every 3 months, and FabFilter Twin 3 every 19 months. Most recently, Xkey Plus was updated on June 6, 2026 and FabFilter Twin 3 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.*