# Xkey Plus vs TB Reverb

The clearest difference is review sentiment: TB Reverb at 94% against Xkey Plus's 36%. TB Reverb also leads on rating (4.8 vs 2.9) and ratings volume (55 vs 13). Xkey Plus's advantage is price (Free vs $8.99) and iOS requirement (9.3 vs 13.0). On update cadence, ads and in-app purchases there is nothing between them.

Xkey Plus is free to download; TB Reverb costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TB Reverb holds the better App Store score, 4.8 against 2.9. Both are backed by a comparable volume of ratings — 13 and 55 respectively. Written reviews point the same way: 36% of Xkey Plus's written reviews are positive against 94% of TB Reverb's.

Xkey Plus ships an update every 3 months, TB Reverb every 2 months. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Xkey Plus | TB Reverb |
| --- | --- | --- |
| Price | **Free** | $8.99 |
| Rating | [2.9 (13 ratings)](https://appshunter.io/ios/app/xkey-plus/id698087460/reviews) | **[4.8 (55 ratings)](https://appshunter.io/ios/app/tb-reverb/id1474944185/reviews)** |
| Number of ratings | 13 | **55** |
| Positive reviews | 35.7% of reviews | **94.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 9 MB | 12 MB |
| Requires iOS | **9.3** | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ESI Audiotechnik GmbH](https://appshunter.io/developer/1627424644) | [ToneBoosters](https://appshunter.io/developer/1472446500) |

## 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


### TB Reverb

[App page](https://appshunter.io/ios/app/tb-reverb/id1474944185)

This professional audio plug-in offers studio-grade reverberation with extensive customization options. It features real-time processing, advanced modulation, and dynamic effects for creative sound design. Compatible with AUv3 hosts, it provides a flexible workflow for musicians and producers.

**Highlights:** Studio-grade reverberation with early reflections, Extensive parameter control (room size, width, density, etc.), Integrated LFO for parameter modulation, Compression, ducking, and gating effects, Shimmer reverb module, Real-time spectrum analyzer and equalizer, Reverb freeze option

**In-app purchases:** none


## Frequently asked questions

### Is Xkey Plus free?

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

### Is TB Reverb free?

TB Reverb costs $8.99, with no in-app purchases.

### Which has better reviews, Xkey Plus or TB Reverb?

TB Reverb is rated higher. Xkey Plus averages 2.9 out of 5 from 13 ratings, while TB Reverb averages 4.8 from 55 ratings.

### Do Xkey Plus or TB Reverb have ads?

Neither Xkey Plus nor TB Reverb shows ads.

### Which is updated more often, Xkey Plus or TB Reverb?

Xkey Plus ships an update every 3 months, and TB Reverb every 2 months. Most recently, Xkey Plus was updated on October 23, 2026 and TB Reverb on October 29, 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.*