iPhone Screenshots


BIAS AMP 2 Mobile is a professional virtual amp designer that offers replications of 36 of the best vintage, modern and boutique amps in rock. The app gives you the power to create new sounds by designing your own dream amplifier, letting you swap out tubes, preamps, power amps, transformers, tone stacks, cab, and microphones, all via a powerful and intuitive interface designed for your iPhone. Whether you’re a classic rocker, metalhead, jazz player, bluesman or singer-songwriter - and whether you understand how amplifier electronics work or not - you’ll be dialing in killer and exclusive tones in a heartbeat.

BIAS AMP 2 Mobile adds a host of new features, including a powerful new user interface, new preamp and power amp tubes, tone stacks, Blues and Bass amp packs, new Dynamic Tone Control, new speaker cabinet module with multi-mic capability and open/closed back cabinet emulation and much more. In addition to all of these amazing new features, we’ve also partnered with legendary Celestion to create brand new custom multi-mic speaker cabs using their famed impulse responses!

BIAS AMP 2 Mobile seamlessly integrates with Positive Grid’s ToneCloud®, which is far more than a simple storage tank for your own custom tones - it’s an active community where thousands of guitarists upload, share and discuss tones. The ToneCloud® gives you access to thousands of custom amps created by artists, recording studios and guitarists like you, so you’ll never lack for sonic inspiration.

To take your tones to the next level, there are 9 full-featured reverbs in BIAS AMP 2 Mobile. These aren’t just simple two-knob reverbs either - they range from lush halls and chambers to intimate rooms, and each reverb has control of decay time, mix level, high and low cut filters, damping and dwell.

BIAS AMP 2 Mobile integrates seamlessly with Positive Grid's JamUp guitar multi-effects app, expanding BIAS AMP 2 Mobile into a powerful and completely unified professional guitar system for live use, recording and jamming. Both JamUp and JamUp Pro include effects processors, Jam player, 8-track recorder and phrase sampler, tuner and metronome, effectively turning BIAS AMP 2 Mobile into a recording studio and top-of-the-line practice utility.

BIAS AMP 2 Mobile also works with GarageBand and other audio apps using iOS’s Inter-App Audio and Audiobus. Whether you’re recording, writing songs or honing your chops—at home or on the road—BIAS products place unequaled tone at your fingertips.


• Complete, accurate and versatile component-level amp modeling
• 36 amp models included with the introductory release, with thousands more available via the ToneCloud®.
• Factory categories that allow you to 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 amp panel by changing the name, tolex, front panel and knobs
• Ability to work 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
• Noise gate
• 9 lush and full-featured reverbs
• Create a virtually unlimited number of custom amps
• Seamless integration with JamUp and JamUp Pro; open and save your amp models inside JamUp with one tap
• Works with GarageBand and other audio apps via Inter-App Audio and Audiobus

Also check out BIAS AMP 2 for desktop machines (AAX/VST/AU) at: www.positivegrid.com

For more information, please visit:
Twitter: @PositiveGrid

What’s New

Version 2.1.7

Hi there,

This latest release brings an update to the factory presets found in the Metal and Insane categories. These updated amp models are now available for download on ToneCloud!

Rock on!
The Positive Grid Team

Ratings and Reviews

4.4 out of 5
153 Ratings
153 Ratings
ak4ray ,

I have to pay for everything again?

So I’ve been using PG’s products for a long time now.

I have the Bias Mini Head, Bias FX for iPad & Mac, Bias Amp 2 for Mac, iPad & iPhone.

So I updated the apps on my iPad and Mac, paying for the extras on both platforms, amp packs, IR packs etc.

Then I updated Bias Amp 2 on my iPhone and was a bit upset to find that I needed to again pay to unlock everything that I had previously paid to unlock on my iPad.

And we’re not talking $20, it’s $14 for the 2.0 unlock, $9 for each of the amp packs, and $19 for the IR packs again.

I can understand paying for Mac and iPad, two entirely different platforms, but to have to pay for the licenses again on my iPhone after paying for everything on my iPad is milking your customers.

I won’t be repurchasing my licenses again for the iPhone and will be deleting the app since I don’t use it on my phone, it would have been useful to tweak my Mini Head, but I’ll just use my Mac and iPad, needless to say for a long time customer this is disappointing.

TheBassixx ,

I did not have to buy any of my amp packs again...

... and the $20 to unlock 2.0 is absolutely worth it .... these guys have done an incredible job making this program..

Everything Positive Grid has done is phenomenal ... as a player I’ve been using JamUp since the very first release, and own everything else they make for iOS.... both iPad and iPhone

I still have not paid more for all of that, than for any single amp head I used to lug around.... now I have ALL OF THEM!

literally in my back pocket any time of the day..

If you play even as a hobby.... you MUST use some of Positive Grid’s offerings ... worth every dime and then some I guarantee it!

I even use it live and the reaction people find out what the time is coming from is priceless every time to this day

seaweed1972 ,

Pay again

I agree we should not have to pay for everything again on the iPhone when I already purchased the iPad update. The excuse that it is a different program is hogwash. AmpliTube doesn’t make you pay twice. Neither do other apps. I have been a customer for along time but to have to pay twice and also loose any upgrades to bias amp one is too much

Developer Response ,

Hi there, the purchased items in BIAS Amp 1 does not disappear when you upgrade to BIAS Amp 2. Please do write us through https://help.positivegrid.com/hc/en-us/requests/new and we can provide more help and information there. Thank you.


Positive Grid Inc
427.9 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2015 PositiveGrid Inc
In-App Purchases
  1. MetalPack $4.99
  2. GlassyPack $4.99
  3. CrunchPack $4.99


  • Family Sharing

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

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