BIAS AMP 2 - for iPhone 4+

Ultimate Virtual Amp Designer

Positive Grid Inc

    • 4.5 • 570 Ratings
    • Free
    • Offers In-App Purchases

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! (Additional preamp, power amp and cab models are available via in-app purchase)

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 BIAS FX and 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, glassy, 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 BIAS FX, JamUp and JamUp Pro; open and save your amp models inside BIAS FX and JamUp with one tap (available via in-app purchase)
• 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:

For more information, please visit:
Twitter: @PositiveGrid

What’s New

Version 2.1.13

Hi there,

This update contains the following changes:

- Fixed an issue with Audiobus connection on iOS 14

Rock on,

The Positive Grid Team

Ratings and Reviews

4.5 out of 5
570 Ratings

570 Ratings

Gern Blasnton ,

The Best Thing Going

Without a doubt the best thing going for iPhone and iPad. No fizz, no buzz, no flop. Great bottom end too. Use it with AUM and add stereo FX. Use it with JamUp for a mono live set up. Could have been five stars but updates are poorly quality controlled. They tend to fix one thing and break another. Get that together PG...PLEASE!

Developer Response ,

Hi there, thanks a lot for the feedback. We are aware that the recent updates might have not been stable. We will be extra cautious with the coming updates! Please write us on and we will keep you updated! Thank you!

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.

liddkdk ,

Bias Amp Mini 300 Head

I paid so much money through the App Store, and now can’t even see what I paid for. I put it on my iPad Pro, iPhone XS,Max,and another old iPad Air. Service is the worst. Can’t get through with ridiculous boxes you can’t even see what your choosing. If I don’t get help by the end of the week it’s going back to zZounds, and I’m going after Apple Store to get all the monies I spent. It worked at first but all this password nonsense is out of control. BTW teaching guitar for 35 years and still going strong. Was going to bring into my studio to show students what not to buy if they don’t rectify the problems by the end of the week. If I’m taken care of, I’ll do a revision.

App Privacy

The developer, Positive Grid Inc, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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