JamUp is the #1 multi-effects processor for guitar and bass. Available for iPad and iPhone, JamUp gives you instant access to a ToneCloud® sharing community with over 10,000 presets from artists, user, and our own Positive Grid team. It’s designed to work seamlessly with BIAS Amp to create your ultimate guitar amp. With more than 3 million users worldwide, JamUp has been featured in Macworld, Premier Guitar, Guitar World, Guitar Player, and more.

The original JamUp comes equipped with one amp and six effects. JamUp Pro gives you the power of six amps and 16 premium rack and stomp-box effects, including distortion, compression, tape delay, tremolo, and spring reverb. Both JamUp and JamUp Pro include jam player, phase sampler, tone sharing, preset manager, optional 8-track recorder, live view, tuner, and metronome.

With its easy-to-use drag-and-drop interface, JamUp enables you to arrange a studio-quality collection of amps and effects models into your own custom signal chain. Get the optional expansion packs for access to a mind-boggling 52 amp channels and 50 classic effects.

Each amp model has been developed using Positive Grid’s MESH multi-stage modeling technology, and has been meticulously measured and analyzed against actual hardware. With its dead-on accuracy and tube-like touch and feel JamUp delivers dramatically improved sonic performance over other digital amp modelers.

Import songs from your iTunes library to jam along with using the Jam Player module. Adjust the tempo and pitch with the high-fidelity time-stretching engine. Easily record and layer looped parts with the sound-on-sound phrase sampler. With the built-in tuner and metronome, and optional 8-track recorder, JamUp delivers a complete, professional processing and recording solution.

Join our worldwide community with JamUp’s ToneCloud® connectivity. Create, share, and download custom presets right inside JamUp. Check out presets from top artists, staff picks, or user-created tones from all over the world.

JamUp now seamlessly integrates with Positive Grid’s BIAS Amp app, instantly expanding JamUp into a powerful and completely unified professional guitar system for live performance, recording, and jamming.

● Real-time guitar/bass amp and multi-effects processor
● Seamless integration with BIAS Amp
● Simultaneously run seven amp and effects models
● Drag-and-drop signal path for easy tone creation
● Six amps and 16 premium effects
● Additional 48 amp channels and 40 effect models (via in-app purchase expansion packs)
● Complete 8-track recorder system (via in-app purchase)
● Phrase sampler with undo feature, start module selection, and synchronized metronome
● Access to your iTunes library with time stretching (pitch/speed) engine via Jam Player
● Tone sharing, allowing you to download over 10,000 artist and user presets or share
your own
● 128 slot preset manager
● Live view control page
● Built-in tuner/metronome
● MIDI learning and assignment
● Audio copy/paste
● Audiobus support in 3 slots
● And much more!

For iPhone 7 users: You will need a Lightning interface with an output to use this Positive Grid app. For more information, please visit:

For more information, please visit:
Twitter: @PositiveGrid

What’s New

Version 3.6.40

Hi there,
In this update, we fixed several minor issues to maintain our reliability. Thanks for your support!

Rock on,
The Positive Grid Team

Ratings and Reviews

4.6 out of 5
57 Ratings

57 Ratings

howie the drummer ,

So much fun for a beginner like myself. Just wish the expansion packs were cheaper.

So much fun for a beginner like myself. Just wish the expansion packs were cheaper.

Mewzon ,

Confused customer!

I purchased JamUp Pro and a ton of amp and effects models. I have my presets all setup and loved the way it functions. However, I just bought a new iPad Pro and now it won’t let me use the JamUp Pro plugin with GarageBand. I get the warning “App not available. Inter app audio app you have selected is not available at this time.” How do I fix this and get my JamUp Pro plugin working with GarageBand again?

I purchased JamUp Pro and all of the existing amps and effects for nearly $100. Now the app won’t even work as a plugin. I’ve been forced to pay all that money again for standard JamUp and its amps/pedals. So I spent nearly $100 and hundreds of hours perfecting my personal presets, only to have the app self destruct. I’d been hoping that it was simply a bug that’d be soon fixed but it’s been non-functioning for several months now.
I am interested in purchasing Bias FX but this current problem has me hesitating. JamUp Pro has been my absolute favourite. The app is superb. I’m a frustrated that I had to buy it all a second time, using the same Apple account.

Any refund options for the nearly $100 off faulty software ?

Developer Response ,

Hi, please do write us through
and tell us more about the problem you encountered. Please use your current ID Mewzon so our agents can recognize you and provide further help. Thank you very much!

Tmrblue ,

Amazing app

An amazing app for any guitarist. I highly recommend buying a digital interface rather than one that plugs into the headphone jack to avoid excess noise which is amplified by high gain amp sims and pedals.

Developer Response ,

Hi there, thanks a lot for the feedback! We're really glad that you enjoy JamUp! :D


Positive Grid Inc
321.2 MB

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


English, Japanese

Age Rating
In-App Purchases
  1. Reverse $3.99
  2. Multi Head $3.99
  3. Echo Delay $3.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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