# Katana Librarian

> BOSS Katana amplifier patch management and editing via Bluetooth. (iPhone/iPad app by 1000452063 ONTARIO INC..)

- Source: https://appshunter.io/ios/app/katana-librarian/id1616920240 (this page in markdown: same URL + `.md`)
- Developer: [1000452063 ONTARIO INC.](https://appshunter.io/developer/1616920242)
- Category: Music, Productivity
- Price: Free with in-app purchases
- Rating: 4.10/5 from 51 App Store ratings · 39 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 6 MB
- Languages: American English
- Released: 2022-04-22
- Data updated: 2026-08-23
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/katana-librarian/id1616920240/reviews.md

## What is Katana Librarian?

Katana Librarian allows you to connect your phone or tablet to your BOSS Katana amplifier via a Bluetooth adapter (sold separately), unlocking your amp’s full potential!

The free version of the app allows you to test your connection and load the built-in demo patches. A one-time in-app purchase is offered if you wish to unlock the full feature set, which will allow you to:

- Download patches from your amplifier.
- Modify the patch parameters; includes support for all effect types; the editor also changes in real-time as you adjust the parameters on your amp.
- Organize your patches into groups. Tag your favorite patches, or create a set list for a live performance.
- Import and export MkI, MkII, Gen3 and GO .TSL files.
- Rename and delete patches.
- Write patches to the amplifier's channels
- Emulate the functionality of a GA-FC pedal (even on a KATANA-50 or KATANA:GO)
- Use the hotkey feature in combination with a MIDI or HID foot switch for hands-free patch and effect switching.
- Access undocumented Katana features like hidden amps and multiple simultaneous effects (where supported).

What you need:

- An iPhone or iPad running iOS/iPadOS 15.0 or later
- A supported Bluetooth adapter*
- One of the following amplifiers:
 • KATANA-50
 • KATANA-50 MkII
 • KATANA-50 Gen3
 • KATANA-50 MkII EX
 • KATANA-50 EX Gen3
 • KATANA-100
 • KATANA-100 MkII
 • KATANA-100 Gen3
 • KATANA-100/212
 • KATANA-100/212 MkII
 • KATANA-100/212 Gen3
 • KATANA-HEAD
 • KATANA-HEAD MkII
 • KATANA-HEAD Gen3
 • KATANA-Artist
 • KATANA-Artist MkII
 • KATANA-Artist Gen3
 • KATANA-Artist MkII HEAD
 • KATANA-Artist HEAD Gen3
 • KATANA:GO

* Currently supported Bluetooth adapters:

MkI and MkII amps:
- CME WIDI Uhost (https://amzn.to/3RKnXdy)
- XSONIC AIRSTEP (https://amzn.to/3QCzJoO)
- XSONIC AIRSTEP Kat Edition (https://amzn.to/3RZaUV2)
- XSONIC AIRSTEP Kat EX Edition (https://amzn.to/3T1Rly2)

Gen3 amps:
- BOSS BT-DUAL (https://amzn.to/3AxrHLB)
- XSONIC AIRSTEP Kat EX Edition (https://amzn.to/3T1Rly2)


See our Frequently Asked Questions here: https://drive.google.com/file/d/19G4j_bk8c8OZ3vBvZKWHnuXg9ZEpKbkx/view

Note: This app is not affiliated with or endorsed by Roland Corporation in any way. BOSS is a registered trademark of Roland Corporation. We may earn commissions for purchases made through links in this listing.

## Key features

- Download patches from amplifier
- Modify patch parameters and effects
- Organize patches into groups and set lists
- Import/export TSL files
- Emulate GA-FC pedal functionality
- Hands-free patch switching with foot switch
- Access undocumented Katana features

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock All Features | $15.95 | one-time |


## Recent user reviews (10 of 39)

All indexed reviews: https://appshunter.io/ios/app/katana-librarian/id1616920240/reviews.md

### 4/5 — Download tsl files.

*2026-05-30*

I got this app a couple years ago. It was working fine, I loved it. Lately, I can not download tsl files anymore. Can you please help me out?

**Developer response:** If you are still having issues please contact us at apps4amps@gmail.com

### 5/5 — Katana Go again on the Market

*2025-09-06*

As the Katana Go is now back in the market it would be great to add it the the Librarian App. Any plans in your development?
I got the great news today that now Katana Go is supported by the app. Thanks to the team! You are great!

**Developer response:** The KATANA:GO is now supported.

### 4/5 — Just a bit limited

*2025-09-05*

All the patches are great, but a bit limited. Maybe a few rhythm patches would be great. Keith Richards, Stone Roses, and some C & W, Chet Atkins, and Buddy Holly, for variety.

**Developer response:** Lots of patches available for download here: https://www.facebook.com/groups/Katanapatchcentral

### 5/5 — Boss Katana Ktn210b support?

*2025-09-05*

Love the app.. any chance of bass katana combos?

**Developer response:** Possibly in the future if there is enough demand.

### 1/5 — Soooo Unreliable

*2025-08-04*

I just got this thinking I wouldn’t have to lug around a laptop for changing my patches but soon discovered it constantly hangs and has to be restarted at least if you are doing imports and exports like me.  I’m on a new iPad BTW connecting to a MKII 100.  It sure would be nice if it only worked!!

### 4/5 — Great Idea, Poor Execution

*2025-07-13*

The concept behind Katana Librarian is excellent – a streamlined, intuitive way to manage Boss Katana patches without relying on Boss Tone Studio. Unfortunately, the execution leaves a lot to be desired.

I’m using a Boss Katana Gen 3 50W and an iPhone 15 Pro Max, so hardware is definitely not the issue. Yet the app is highly unstable, crashing almost every time I try to make any edit. This makes it incredibly frustrating and unreliable, especially when quick adjustments are needed.

Considering the app costs $14.99, you’d expect a far more polished and stable product. As it stands, it feels more like an unstable beta than a finished app. With some serious updates and bug fixes, this could be a fantastic tool for Katana users – but right now, it’s hard to recommend.

**Developer response:** We cannot reproduce the issue are describing. If you are still encountering problems please contact us at apps4amps@gmail.com.

### 1/5 — How do I get my money back

*2025-03-24*

I would like to get my money back, this app is not what I thought it would be . Boss tone studio is better

**Developer response:** You need to contact Apple, as they do not provide us with the ability to refund purchases.

### 4/5 — Great app with 1 issue

*2025-01-05*

Love the app - so much better than the BOSS app. However in the past few weeks I have not been able to change patch from within a group - I have to go back to the main list. Happens on the app on iPad and iPhone. Hoping this gets resolved soon and gets back to 5 stars!

**Developer response:** Not sure what issue you are encountering; please contact us at apps4amps@gmail.com and we will attempt to get it resolved.

### 5/5 — Truly amazing app.

*2025-01-05*

This app is awsome very smooth with a lot of cool features.

### 3/5 — Gen 3 Katana 50ex IoS

*2024-12-22*

Slow to change patches on USB connection.
Cannot return to librarian when using Bluetooth connection. It says ‘connected’ but remains on Connect Amp window thereafter
.

**Developer response:** ? USB connections aren't supported on iOS. If you are still encountering issues please contact us at apps4amps@gmail.com.

## Frequently asked questions about Katana Librarian

### What does the Katana Librarian app do?

The Katana Librarian app allows you to connect your BOSS Katana amplifier to your phone or tablet via a Bluetooth adapter. It enables you to download, edit, and organize your amp's patches, manage effect parameters, and even emulate the functionality of a GA-FC pedal.

### What are the key features of the Katana Librarian app?

Key features include downloading patches from your amp, modifying all patch parameters and effects, organizing patches into groups and set lists, importing/exporting TSL files, emulating GA-FC pedal functionality, and accessing undocumented Katana features.

### How much does the Katana Librarian app cost?

The app offers a free version that allows you to test your connection and load demo patches. A one-time in-app purchase is available to unlock the full feature set, providing access to all advanced management and editing capabilities.

### What are the compatibility requirements for the Katana Librarian app?

You need an iPhone or iPad running iOS/iPadOS 15.0 or later, a supported Bluetooth adapter (sold separately), and one of the listed compatible BOSS Katana amplifiers (various models from MkI, MkII, Gen3, and GO are supported).

### Can I use this app for live performances?

Yes, the app is designed to be useful for live performances. You can organize your patches into set lists and use the hotkey feature in combination with a MIDI or HID foot switch for hands-free patch and effect switching during a show.

## Version history (last 5 releases)

### 5.7.1 — 2026-06-16

Added patch sorting to the Library

### 5.7 — 2026-06-14

Added patch sorting to the Library

### 5.6.2 — 2026-01-14

- Support for the KATANA:GO tuner
- Improved GO patch conversion

### 5.5 — 2025-12-08

Improvements for iOS 26

### 5.4.2 — 2025-09-25

Gen3 performance improvements.

## Apps similar to Katana Librarian

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [BTS for KATANA BASS](https://appshunter.io/ios/app/bts-for-katana-bass/id1577499205) | 2.6 (7) | Free | Music |
| [BTS for WAZA-AIR](https://appshunter.io/ios/app/bts-for-waza-air/id1475728751) | 2.4 (79) | Free | Music |
| [AmpliTube TONEX](https://appshunter.io/ios/app/amplitube-tonex/id1613359930) | 2.0 (6) | Free | Music |
| [BTS for KATANA:GO](https://appshunter.io/ios/app/bts-for-katanago/id6469464648) | 3.1 (21) | Free | Music |
| [BTS for KATANA Gen 3](https://appshunter.io/ios/app/bts-for-katana-gen-3/id6477823493) | 1.9 (63) | Free | Music |
| [BTS for KATANA-AIR](https://appshunter.io/ios/app/bts-for-katana-air/id1336823491) | 2.3 (69) | Free | Music |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*