Experience guitar tone like never before.

BIAS for iPhone

BIAS for iPad



BIAS is an Amp Designer, Modeler and Processor.

It allows you to change preamp tube types, edit preamp voicing, adjust bias, audition various transformer types, swap out loudspeakers and cabinets, move microphone placement and much, much more.

Tone – At a Whole New Level

We didn’t think we would be pushing the boundary by merely adding more bells and whistles to an amp simulator, so we threw out convention and focused instead on what matters most to guitar players. BIAS, the result, is a major step forward in tone.

Every component is meticulously engineered to respond to playing with immediacy, sensitivity and realism, helping guitarists not only sound better but play better as well.

Custom Make Your Own

Create totally new sounds by designing your custom dream amp. It’s as easy as tap and drag.

Using Bias’ highly intuitive and lightning-fast interface, it’s child’s play to instantly swap out colorful tube preamps, lush distortion circuits, classic tone stacks, boutique power stages, custom-built transformers and cabs loaded with specially matched speakers.

The result is a depth and range of tones not possible using traditional guitar amps or other static modelers.


Bias integrates seamlessly with JamUp XT and JamUp Pro XT guitar multi-effects apps for iPad, expanding Bias into a powerful and completely unified professional guitar system for live use, recording and jamming.

Simply tap on the JamUp icon on the right side of Bias’ upper menu bar to open your current Bias amp setup directly in either JamUp XT or JamUp Pro XT. And you can open BIAS from JamUp by tapping the BIAS icon to tweak your models.


Create, share and download custom amps on the cloud.

The tone-creation possibilities are now virtually infinite with BIAS. Download artist’s signature amps, or try out the latest and popular user tones, or simply search for that special tone you’ve always wanted.

Tour, backstage and warming up

Jake Bowen of Periphery tells us how he uses JamUp and BIAS for backstage and warming up.

“Warming up backstage will determine whether or not I have a good show, I’ve tried a bunch of portable alternatives and they all feel strange or the tone is too thin or too fuzzy. JamUp and BIAS allow me to scrutinize my tone to where it feels and sounds the way I need it to.” — Jake Bowen of Periphery

Professional guitar recording

Ola Englund shows how he uses BIAS for his insane metal recording projects.

“The most in depth and fun amp modeler I’ve ever laid my hands on, it sounds absolutely awesome!” — Ola Englund, Fearedse

It’s beyond all your expectations

Ryan Bruce shares what he thinks about the tone, the features and the endless possibilities of BIAS.

“This app is simply amazing. Change the virtual tubes, power transformer, speaker cab, mic, gain staging, everything. I am not sure how they did it, but I am glad they did!!” — Ryan Bruce



  • The most complete, accurate, and versatile amp modeling available in the world
  • 36 amp models included with the introductory release
  • Factory categories organize amps by music genre and sonic impact: clean, blues, twang, crunch, metal, acoustic and bass
  • Fully customizable preamps, tone stacks, power amps, transformers, cabinets and mic selection and placement—mix and match!
  • Customize the look and feel of your own amp panel, change name, tolex, panel and knobs.
  • Works the way guitarists think: tweak gain and overdrive, swap out tubes and transformers, change the cabinet and mic position, and shape the tone with different tone stacks and two 8-band equalizers
  • Included noise gate and room simulator
  • Create a virtually unlimited number of custom amps
  • Quick preset to recall each of your 8 favorite settings in turn with just one tap
  • Seamless integration with JamUp XT and JamUp Pro XT, open and save your amp models inside JamUp with one tap
  • Works with GarageBand and other audio apps via Inter-App Audio and Audiobus.

BIAS supports all major iOS audio interface:

  • JamUp Plug
  • JamUp Plug HD
  • Apogee JAM
  • Alesis iO Dock
  • Guitar Jack 2
  • Griffin StudioConnect
  • Griffin GuitarConnect Cable
  • Griffin GuitarConnect Pro
  • Line 6 Mobile In
  • Line 6 Sonic Port
  • IK Multimedia iRig
  • IK Multimedia iRig HD
  • Peavey AmpKit Link
  • Peavey AmpKit Link HD
  • PocketLabWorks iRiffPort
  • TASCAM iU2
  • Focusrite iTrack Solo
  • Roland Duo Capture EX

BIAS for iPhone Requirements

  • iPhone 4S, iPod touch 5th gen and newer
  • iOS version: iOS 7

BIAS for iPad Requirements

  • iPad 2 and newer, including iPad mini
  • iOS version: iOS 7