# KeyStage vs TB Reverb

The clearest difference is price: TB Reverb at $8.99 against KeyStage's $29.99. TB Reverb also leads on in-app purchases (none vs 7) and device support (3 vs 1). On rating, review sentiment, ratings volume and update cadence there is nothing between them.

KeyStage costs $29.99 and TB Reverb $8.99 up front. KeyStage sells 7 one-off in-app purchases. TB Reverb asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for KeyStage against 4.8 for TB Reverb. Both are backed by a comparable volume of ratings — 41 and 55 respectively. Written reviews are what separate them: 91% of KeyStage's written reviews are positive against 94% of TB Reverb's.

KeyStage ships an update every 3 months, TB Reverb every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | KeyStage | TB Reverb |
| --- | --- | --- |
| Price | $29.99 | **$8.99** |
| Rating | [4.7 (41 ratings)](https://appshunter.io/ios/app/keystage/id1406132634/reviews) | **[4.8 (55 ratings)](https://appshunter.io/ios/app/tb-reverb/id1474944185/reviews)** |
| Number of ratings | 41 | **55** |
| Positive reviews | 91.0% of reviews | **94.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 61 MB | 12 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ali Gokturk](https://appshunter.io/developer/1406132633) | [ToneBoosters](https://appshunter.io/developer/1472446500) |

## What reviewers say

### KeyStage

[App page](https://appshunter.io/ios/app/keystage/id1406132634)

This app acts as a master controller, AUv3 host, and audio mixer for keyboard players. It allows simultaneous control of multiple hardware and software instruments via MIDI, with advanced mapping, scripting, and audio mixing capabilities.

**Highlights:** Connect multiple MIDI controllers to instruments, Load AUv3 instruments, effects, and MIDI processors, Create complex keyboard splits and layers, Advanced MIDI mapping and scripting, Audio mixer with volume and pan control, Play and automate audio files, View PDF and JPG files

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Instrument Units | Free | one-time |
| Effect Units | Free | one-time |
| Player, Input, and Mixer Units | Free | one-time |
| MIDI Units | Free | one-time |
| Small Tip | $0.99 | one-time |
| Medium Tip | $3.99 | one-time |
| Large Tip | $9.99 | one-time |

**What reviewers like**

- 🚀 Powerful for live performance
- 👍 Replaces hardware keyboards
- 💡 Seamlessly integrates AUv3 apps
- 👍 Excellent MIDI control
- 👍 Great for organizing setlists

**What reviewers complain about**

- 🐛 App is ugly (UI)
- 🐛 Some users experience crashes
- 🐛 Learning curve for new users
- 🐛 In-app purchases for core features
- 🐛 Slow song loading times

**Reported bugs**

- Custom Translators Database not downloading
- Snap to grid on wave files not lining up
- Song switching via MIDI channels not working
- App crashes when trying to use instruments Database (older iOS)
- Occasional crashes

**Requested features**

- More complete user manual with troubleshooting
- Beginner's explanation of MIDI and AUv3
- MIDI Clock In + Seq Sync
- Global Tap Tempo
- In-line FX bypass (MIDI mappable)


### 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 KeyStage free?

KeyStage costs $29.99, and also offers in-app purchases.

### Is TB Reverb free?

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

### Which has better reviews, KeyStage or TB Reverb?

TB Reverb is rated higher. KeyStage averages 4.7 out of 5 from 41 ratings, while TB Reverb averages 4.8 from 55 ratings.

### Do KeyStage or TB Reverb have ads?

Neither KeyStage nor TB Reverb shows ads.

### Which is updated more often, KeyStage or TB Reverb?

KeyStage ships an update every 3 months, and TB Reverb every 2 months. Most recently, KeyStage was updated on November 2, 2026 and TB Reverb on November 3, 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.*