Learn your amp as you use it.
Plain-English explanations sit beside the controls. Find out what a setting does, make a small change, and hear it in your playing.
In development
Your Katana.
Smarter.
The modern companion for BOSS Katana amps.
Shape tones by ear. See what makes them work.
Coming next: name a song or describe a sound, and get a tone built around your guitar, your amp, and your taste.
We’re building it for iPhone, iPad, macOS, and Android. Apple versions come first, with Android following.
Full Editor. Unlimited local tones. Free.
Shape · Understand · Create
Built by gigging musicians, for gigging musicians and anyone who loves a good guitar tone.
Tone editing, evolved
Shape tones
by ear.
Brighter. Tighter. Cleaner. Edit in the language you already use. Shape adjusts the settings behind each nudge, so you can play, listen, and try again with Undo.
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Understand
your sound.
See how every part of your tone fits together. Sound makes gain, EQ, movement, and space visible, with controls grouped by what they do to your sound.
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Development screenshots on iPad. All views edit the same tone and share Undo history. With a compatible amp connected, Hear on Amp lets you listen as you edit.
Go deeper in Classic.
The full signal chain is always close by. Gain, EQ, and effect amounts come first, with detailed settings inside each block. Switch views whenever you want.
Automated Tone Generation · In development
Name a song.
Describe a sound.
A song, a playing role, or the sound in your head can be the starting point. Automated Tone Generation is being built to create a tone around your guitar, your Katana, and your taste.
Hear the starting point on a compatible connected amp, then make it yours in the Editor. You stay in control of what to keep and what to change.
Ask about testing it
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In-app tone browsing
From tone browsing
straight to your library.
Find a compatible Katana patch on BOSS Tone Exchange or Guitar-Tones.com and add it directly to your Tone Ninja library. Everything happens inside the app, without saving a download, using AirDrop, or importing from Files.
BOSS Tone Exchange and Guitar-Tones.com are third-party services. Tone Ninja is not affiliated with or endorsed by either.
Both browsers are shown inside Tone Ninja.
BOSS Tone Exchange
Search and filter Katana patches, then add compatible tones directly to your library. Roland account required.
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Guitar-Tones.com
Browse by amp model and add compatible Katana tones directly to your library. No account required.
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Choose patches for your Katana model and generation. The tone’s effects and settings still need to be supported by your amp.
Library & Perform
Every tone, organized.
Your library, in sync.
Keep tones, Live Sets, Song Packs, and Gig Packs together. Basic includes unlimited local tones. Tone Ninja Plus adds cloud backup and cross-device sync, so your library can follow you from one device to the next.
Find your saved tones.
Keep individual tones, Live Sets, Song Packs, and Gig Packs together. Search your library, preview a saved sound, or open a pack. Import and export compatible .tsl files.
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Channels and effects in one view.
Switch channels and turn supported effects on or off. Channel names and selected effect models help you keep track of the current sound.
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Good to know
Availability &
compatibility.
Tone Ninja is in development for iPhone, iPad, macOS, and Android. Amp compatibility is still being tested.
When can I try it?
Tone Ninja is still in development. To ask about beta testing, send us a message using the form below.
Can it build a tone from a song or description?
Automated Tone Generation is in development. It’s being built to create a starting tone for your guitar, amp, and preferences from a named song or a sound description. You’ll be able to hear it on a compatible connected amp and adjust it in the Editor.
Where should I start if I’m new to amps?
Start in Shape with a small nudge such as Brighter or Cleaner. Play a few notes and listen. Sound helps you see the settings behind those changes. Open Classic when you want the full signal chain.
Which devices is it being built for?
Tone Ninja is in development for iPhone, iPad, macOS, and Android. The Apple versions will debut first, followed by Android.
Will it work with my Katana?
It depends on your Katana model, generation, firmware, and connection. Compatible BLE MIDI bridges are supported. Direct USB MIDI support varies by device and amp. Testing is still in progress.
Can I use my existing patch files?
Compatible BOSS Tone Studio .tsl files can be imported and exported. Conversion is available for supported generations, with differences shown along the way. The patch’s effects and settings still need to be supported by your target amp.
Is this an official BOSS app?
No. Tone Ninja is an independent product developed by ESG Ventures LLC. It is not affiliated with or endorsed by Roland Corporation, BOSS, BOSS Tone Exchange, or Guitar-Tones.com.
Contact us
Drop us a note.
Ask us about the beta, tell us what you’re playing, or share an idea for the app.