JamUp Pro vs Cali Axis Guitar Amplifier
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JamUp Pro
This app provides a powerful multi-effects processor for guitar and bass, offering a vast library of amp and effect models. Users can create custom signal chains, access a community of shared presets, and record their music.
- Multi-effects processor for guitar and bass
- Access to 6 amps and 16 premium effects
- Customizable signal chain with drag-and-drop interface
- ToneCloud® for sharing and downloading presets
- Jam Player with tempo and pitch adjustment
- 8-track recorder and phrase sampler
- Seamless integration with BIAS Amp
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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. Features: ● 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 module ● 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: https://help.positivegrid.com/hc/en-us/articles/115003558023-How-to-set-up-with-my-iPhone-iPad- For more information, please visit: www.positivegrid.com Twitter: @PositiveGrid facebook.com/positivegrid
Cali Axis Guitar Amplifier
This app offers a versatile guitar amplifier simulation with multiple preamp modes, an FX section, and a power amp. It includes digital delay, analog modulations, ambient reverb, and a noise gate for shaping your sound. Works as a standalone app or with other audio applications.
- Multiple preamp modes
- Adjustable FX section
- Virtual EL34 power tubes
- Digital delay with filter and offset
- Analog Chorus or Tremolo
- Ambient Hall reverb
- Noise gate and studio compressor
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“Cali Axis is an arsenal of the most powerful guitar tones now available in standalone and plugin format” PREAMPLIFIER Nembrini Audio Cali Axis All Tube Guitar Amplifier plugin is based on Mesa Boogie TriAxis* preamplifier. Eight separate modes deliver the elusive creamy gain of the Mk I, the heralded focus of the Mk I, the scooped Rhythm of the Mk IV, and a modified British lead mode. But these are just a few of the classic sounds at your fingertips. FX SECTION Select, enable and change the order of the single FXs. POWER AMPLIFIER Powered by four EL34 virtual tubes with presence, resonance, volume and power switch in class AB push-pull configuration. MODERN button change the negative feedback in a way to have a more “modern” presence behaviour. DIGITAL DELAY FILTER make the delay Lo-Fi and OFFSET create a time offset in left/right delay sections ANALOG MODULATIONS select Chorus or Tremolo modulation AMBIENT REVERB Hall reverb algorithm FILTER A/B TIGHT : Clockwise rotation reduces low frequency content tightening the low range, suitable for 7/8 strings guitars. RUMBLING : Clockwise rotation reduces low frequency content. HARSH : Clockwise rotation reduces high frequency content. ANALOG NOISE GATE tuned for guitar and bass with GATE speed control STUDIO COMPRESSOR keep your dynamics in check, whether just thickening the sound or keeping levels consistent Works as a standalone app, AudioUnit v3 effect, or Inter-App Audio effect. Legal Disclaimer: TriAxis is a registered trademark of Mesa Engineering. Nembrini Audio Cali Axis was developed by Nembrini Audio SRL based on its own modelling techniques. Mesa Engineering has not endorsed nor sponsored the Nembrini Audio Cali Axis in any manner, nor licensed any intellectual property for use in this product.
Screenshots
Verdict
The clearest difference is price: JamUp Pro at $7.99 against Cali Axis Guitar Amplifier's $19.99. JamUp Pro also leads on update cadence (every 2 months vs every 38 months) and ratings volume (716 vs 7). Cali Axis Guitar Amplifier's advantage is review sentiment (100% vs 65%) and in-app purchases (none vs 10). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
JamUp Pro costs $7.99 and Cali Axis Guitar Amplifier $19.99 up front. JamUp Pro sells 10 one-off in-app purchases. Cali Axis Guitar Amplifier asks for nothing beyond the download.
Cali Axis Guitar Amplifier holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: JamUp Pro has 716 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 65% of JamUp Pro's written reviews are positive against 100% of Cali Axis Guitar Amplifier's.
JamUp Pro ships an update every 2 months, Cali Axis Guitar Amplifier every 38 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | JamUp Pro | Cali Axis Guitar Amplifier |
|---|---|---|
| Price | $7.99 — better | $19.99 |
| Rating | 4.6 (716 ratings) | 5.0 (7 ratings) — better |
| Positive reviews | 64.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 716 — better | 7 |
| Update frequency | Every 2 months — better | Every 38 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15 |
| Further details — not scored | ||
| Size | 309 MB | 29 MB |
| Age rating | 4+ | +4 |
| Developer | Positive Grid Inc | Nembrini Audio |
Customer experience
JamUp Pro
Cali Axis Guitar Amplifier
Bugs and requests
JamUp Pro
Reported bugs
4 issues- Jam/playback feature not working
- Preset saving/loading issues
- Incompatibility with newer iPhones
- Frequent crashes and freezes
Requested features
5 requests- More customization options
- Improved MIDI support
- Better integration with DAWs
- Stereo effects support
- Ability to import custom IRs
Cali Axis Guitar Amplifier
Not enough reviews yet to summarise bugs or requests.
In-app purchases
JamUp Pro
- Whammy$3.99
- 8-Track Recorder$4.99
- Metal Expansion Pack$9.99
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- Classic Expansion Pack$9.99
- Effect Expansion Pack$9.99
- Bass Expansion Pack$9.99
- Boutique Expansion Pack$9.99
- Metal Expansion Pack II$9.99
- Acoustic Expansion Pack$9.99
- All Access$24.99
Cali Axis Guitar Amplifier
No in-app purchases
Questions
Is JamUp Pro free?
Is Cali Axis Guitar Amplifier free?
Which has better reviews, JamUp Pro or Cali Axis Guitar Amplifier?
Do JamUp Pro or Cali Axis Guitar Amplifier have ads?
Which is updated more often, JamUp Pro or Cali Axis Guitar Amplifier?
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