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, users, and our own Positive Grid team. It’s designed to work seamlessly with BIAS Amp to create your ultimate guitar amp, and 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 vastly-improved sonic performance over other mobile 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 

●  One amp and six effects 

●  Additional 52 amp channels and 50 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 3.6.35

Hi there,

This latest release brings the following changes:

- Refined the Restore Purchase process for improved stability.
- Fixed the crash issue that occurs when an invalid AirTurn event is received.

Rock On!
The Positive Grid Team

Ratings and Reviews

4.6 out of 5
201 Ratings
201 Ratings
Jennie the Jesus-lover ,

Falling in love with this

It's ethereal fun using the delay and plate reverb effects and good to see that it can record my vocals when the iRig isn't plugged in. And I love that it loops the recording you did so that you can keep listening to it and the dubbing is fantastic. I find my recording snippets get stuck in me head the rest of the day haha. I'm having a ball so far thank you. ☺️🎶🎸♥️🌸🌱

Update: I'm noticing an awful long loud distorted him when I use the delay effect and I can't figure out where it's coming from. This frustrates my recording. I hope it's fixable.
Update: getting the hang of this. I’m discovering new ways to change the sounds and though I’m still learning it’s indeed one of the more superior apps and isn’t too complicated for me to figure out. Still love using that plate reverb and delay effect and have been writing music. ❤️🎶🎸🎶🎤God bless🤗🙏♥️🎶❤️

Developer Response ,

Hi! Please do write us on and tell us more about the problem on your device! We will follow up and find out the solution for you!

Ethogibs ,

Really fun!

Pretty fun stuff! Sounds really good out of the box and sounds even better with more tweaking! I’d be careful if you have active pickups...sometimes it’s too hot for the app and you get a really loud screeching feedback sound. But overall really neat! I use an irig2 into my iPhone SE. I do recommend getting the bias app with this too. That will REALLY make it sound better. I use it for recording and just playing late at night without disturbing anyone!

Developer Response ,

Hi, we are really glad you enjoy JamUp. Cheers! :D

dsdfggj ,

Great app but....

First of all I love this app I use this along with bias amp witch is also amazing effects sound great and the metal amp pack is awesome too. My only problem with this app is I have a red notification in the top of my phone almost daily and sometimes twice daily asking me to restore perches I mean it’s really a minor inconvenience but it’s getting annoying. This is the only reason this app gets 4 stars for me.


Positive Grid Inc
321.9 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Japanese
Age Rating
Rated 4+
© 2015 Positive Grid Inc
In-App Purchases
  1. JamUp Pro Upgrade $19.99
  2. Metal Expansion Pack II $4.99
  3. Metal Expansion Pack $4.99


  • Family Sharing

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

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