Katana Librarian

Name: Katana Librarian
Rating: 4.1 (51 reviews)
Author: 1000452063 ONTARIO INC.

By: 1000452063 ONTARIO INC.

Music

Features & Capabilities

Katana Librarian is a patch editor and librarian for BOSS Katana amplifiers. It connects from iPhone or iPad to your amp over Bluetooth, letting you load, edit, and organize patches directly from your mobile device. The app offers a free version for testing and an optional one-time in-app purchase to unlock the full feature set.

Upgrade unlocks include patch download and real-time parameter editing across all effect types, grouping and tagging for live sets, import/export of MkI, MkII, Gen3 and GO .TSL files, rename/delete operations, writing patches to amp channels, GA-FC pedal emulation, and hotkey control with MIDI/HID foot switches. It also exposes undocumented Katana features where supported. Requirements: iOS 15.0+ on iPhone/iPad with a supported Bluetooth adapter and one of the listed Katana models. Note: This app is not affiliated with or endorsed by Roland.

User Growth & Download Statistics

App Music & Audio

By:

1000452063 ONTARIO INC.

Rating:

4.10

(51)

Version:

5.6.2 Last updated: 2026-01-14

Version code:

881471844

Creation date:

2022-04-22

Compatible devices:

Size:

5.89MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 202,600 ▼ 431

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

1000452063 ONTARIO INC.

Apple Apps Store

https://apps.apple.com/us/app/katana-librarian/id1616920240

User Reviews

Katana Librarian shines for mobile patch editing and direct library saving, with an intuitive UI and strong live workflow, often outperforming Boss Tone Studio. However, stability issues, hardware-connectivity hurdles, and device-feature gaps, plus concerns about value, temper its appeal. It’s a promising tool for Katana users that needs fixes and broader hardware support.

Pros

Laptop-free patch editing on iPad/iPhone (edit patches without carrying a laptop).
Saves edits directly to the patch library, not just to amp channels (unlike Tone Studio).
Intuitive, streamlined UI and strong patch-management concept.
Excellent for live/gig use, enabling patch editing/control from across the room.

Cons

Frequent crashes and hangs when editing; stability is a major issue.
Connectivity problems with hardware (e.g., CME Widi uhost) and reliance on external adapters (Bluetooth) to work.
Incompatibility with older devices (e.g., iPhone 8 and earlier) and missing features on those devices.
Feature gaps and bugs (can't change a patch within a group; patch organization could be improved; no bass Katana support yet).
Perceived high price given current instability and limitations.

Recent reviews

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

by Ln*****, 2025-09-05

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!!

by Em*****, 2025-08-04

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.