ToneStack is the ultimate UNIVERSAL app for signal processing: with the LARGEST and BEST selection of AMPS & FX, the latest advancements in modeling technology, and an unbelievably powerful yet simple interface – it simply shreds all the other guys. 

Thanks to ToneStack's state-of-the-art “Virtual Circuit” technology, each ToneStack unit is the digital mirror image of a real analog topology. Unlike other FX apps that try to copycat with EQing and other gimmicks, ToneStack recreates the intricate designs of the real thing. The result is a warm, responsive tone with the natural behavior you find in analog units.

Best Selection of Pro Amps & FX

ToneStack offers a huge range of amps, cabs & FX: from sparkly clean to sizzling hot bias tube amps, iconic stompboxes, pro-grade rack units, and high-end reverbs, ToneStack is the most complete plugin suite on the iOS.

Right away, enjoy 6 classic amps & cabs, and 21 meticulously designed FX. Expand to a total of 46 amps, 44 cabs, and 101 FX – the largest collection on iOS.

ToneStack also brings many powerful guitar FX to the iOS for the first time: polyphonic octaver, harmonizer, realistic spring reverbs, virtual-reel tape delays are just a few examples.

The Most Versatile Signal Chain on iOS

Why be limited with just 4 or 8 FX that other guys max you out at? ToneStack lets you run a whopping 64 amps & effects simultaneously* so you can let your imagination run wild.

For even more power, ToneStack includes our unique original ABY unit. Split your signal anywhere: run dual amp setups, switch or blend FX chains, or multiplex your signal via frequency splitting – countless permutations, all up to you.

You can match any amp with any cab (all cabs have 3 mics with distance & position settings); you can insert any unit anywhere – even between amps and cabs like a true FX loop. Managing your signal chain is as easy as dragging and dropping an icon!

inSTUDIO & Other Goodies

Wanna quickly jam out an idea, or cut a song and share it? ToneStack offers a powerful 8-Track recorder – first two tracks free — with plenty of user-friendly features. Fire up the built-in Tapedeck to quickly record an idea or create loops, or manipulate audio with its Hi-Q pitch & time shift. Import & export audio via email, WiFi, iTunes or copy/paste. Built-in tuner, metronome and a custom onSTAGE mode are just a few other amazing ToneStack features.

All the Pro Features of iOS

Enjoy the full power of the platform’s top MIDI and Preset systems. MIDI learn is super-intuitive thanks to ToneStack's WYSIWYG interface: all the amp & FX controls are MIDI-programmable. Effortlessly create UNLIMITED banks and presets – share them at the touch of a button. ToneStack is an Inter-App Audio effect, and works in any Audiobus slot. ToneStack also allows you to insert other Inter-App Audio apps anywhere in your signal chain.


• “Virtual Circuit” amp & FX modeling technology
• Units modeled after real-life circuits
• ABY: split signal anywhere, use dual amp setups, blend, pan or switch FX chains & more
• Complete collection: 46 amps, 44 cabs, 101 FX, with stompboxes & rack-units and more!
• 64 simultaneous amps & FX*
• Independent amps & cabs
• 3 mics per cab w/ distance & position setting
• 8-Track recorder w/ 2 tracks free
• Tapedeck w/ punch looping, sample-accurate rec, pitch/time manipulation, FX send
• Tuner w/ permanent & fullscreen modes
• Metronome, tap tempo, settable time signature
• onSTAGE mode w/ quick preset load & FX toggle
• Extremely powerful MIDI: control any amp or FX parameter
• Easy MIDI Learn
• MIDI prog changes + bank & preset up/down
• Inter-App Audio Hosting; Insert IAA apps anywhere in your signal chain
• Audiobus support
• Works w/ iOS compatible USB or headphone interfaces (USB recommended for best audio quality)

* Device CPU limitations apply

What’s New

Version 3.3

Various optimizations and improvements

Ratings and Reviews

4.5 out of 5
78 Ratings

78 Ratings

chegaro ,

NOTHING touches Tonestack, NOTHING....

Hands down the best guitar sound processing app on the appstore, or anywhere else, for that matter (Bias amp is Good, and Bias Fx is, too, but it is too buggy and hard to tweak just right to get it to sound decent, and every effect added to an amp, diminishes the sound quality, quite extraordiinarily — NONE OF THAT WITH TONESTACK). All the effects here in Tonestack, are fantastic sounding, and quite organic, too, as are all the amplifiers (the Vox and Fender amps are STUNNING). It seems like most people griping here about it either don’t have a decent interface with which to use it, and so as to be able to tweak it just right to get all the available monster tones, or simply aren’t experimenting with it enough. Some of the negative reviews actually shock me, because Tonestack sounds so good to me, and right out of the gate. Every time. Anyway, I have been using it since its inception (around 2014) and it’s hands down my go to app for guitar, and I have them ALL. I wish to God they made a desktop version for the Mac, but who knows if that will ever happen. Also, Yonac, I’M TALKIN’ TO YOU!! Are there going to be any updates soon, it has been a year now, without an update...perhaps NEW GEAR SOON?? Love you guys!!

blueswanderer ,

The Best!

I've been trying to find a good amp sim for 10+ years, including various hardware modelers. I've tried all the iOS apps and this leaves them in the dust; I've yet to find a better, organic 'tube' sound and have drawn compliments using this for open mics.

The only nits: while it is possible to save/share settings, the app doesn't have any kind of community feature to faciliate sharing presets (the company's forum has a thread for this, but it isn't very active). I also wish there were a way to get ToneStack on my Mac!

GabrielQ ,

Tone doesn't Stack up

Let me preface this by saying I recently switched from a 12 pedal pedalboard to an iPad based setup with a guitar wing and source audio hot hand USB for control. I mostly just wanted to copy the setup I have on my pedalboard but for full wireless and pedal free operation.
Have been using bias fx, but got this because I really like how much better the midi control options are on this. Really wanted this to work because the midi control is pretty great. However, it doesn't deliver where it counts: the sound. The overdrive/distortion sounds just don't cut it, they sound like modeled tones, whereas bias actually sounds real. Tried really hard to dial in convincing tones and couldn't do it. Also, the phase 90 clone is horrible and tone sucking, and that's a huge part of my playing, so that is a killer right there.
The ups:
I will say though, I use the wah as a iaa w/ bias, it sounds much better and responds much better to midi control. Echorec in ToneStack sounds pretty good too. I might try the poly octave too, because I'm not terribly happy w/ bias fx's version.

I mean, if you want 90's/early 00's level modeling sounds, this has a ton of options, and great control... but I'm accustomed to the real gear, and the Tone just doesn't Stack up for what I need on the core sounds.


Yonac Inc.
212.2 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. Expansion v.3.0 $19.99
  2. Motherload v.1.0 $49.99
  3. Expansion v.2.0 $19.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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