# JamUp Pro vs Cali Axis Guitar Amplifier

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.

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.

## The numbers

| Metric | JamUp Pro | Cali Axis Guitar Amplifier |
| --- | --- | --- |
| Price | **$7.99** | $19.99 |
| Rating | [4.6 (716 ratings)](https://appshunter.io/ios/app/jamup-pro/id454702113/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/cali-axis-guitar-amplifier/id6451101787/reviews)** |
| Number of ratings | **716** | 7 |
| Positive reviews | 64.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 38 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 309 MB | 29 MB |
| Requires iOS | **10.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [Positive Grid Inc](https://appshunter.io/developer/751979910) | [Nembrini Audio](https://appshunter.io/developer/1493296895) |

## What reviewers say

### JamUp Pro

[App page](https://appshunter.io/ios/app/jamup-pro/id454702113)

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.

**Highlights:** 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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Whammy | $3.99 | one-time |
| 8-Track Recorder | $4.99 | one-time |
| Metal Expansion Pack | $9.99 | one-time |
| Classic Expansion Pack | $9.99 | one-time |
| Effect Expansion Pack | $9.99 | one-time |
| Bass Expansion Pack | $9.99 | one-time |
| Boutique Expansion Pack | $9.99 | one-time |
| Metal Expansion Pack II | $9.99 | one-time |
| Acoustic Expansion Pack | $9.99 | one-time |
| All Access | $24.99 | one-time |

**What reviewers like**

- 👍 Great sound quality
- 🚀 Low latency
- 💡 Versatile amp and effects models
- 👍 Intuitive and easy to use interface
- 👍 Affordable compared to hardware

**What reviewers complain about**

- 🐛 Compatibility issues with newer iOS versions
- 🐛 Crashes and stability problems
- 💰 Expensive in-app purchases
- 🐛 Unreliable backup/restore of purchases
- 🐛 Delayed or unresponsive controls

**Reported bugs**

- Jam/playback feature not working
- Preset saving/loading issues
- Incompatibility with newer iPhones
- Frequent crashes and freezes

**Requested features**

- More customization options
- Improved MIDI support
- Better integration with DAWs
- Stereo effects support
- Ability to import custom IRs


### Cali Axis Guitar Amplifier

[App page](https://appshunter.io/ios/app/cali-axis-guitar-amplifier/id6451101787)

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.

**Highlights:** 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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is JamUp Pro free?

JamUp Pro costs $7.99, and also offers in-app purchases.

### Is Cali Axis Guitar Amplifier free?

Cali Axis Guitar Amplifier costs $19.99, with no in-app purchases.

### Which has better reviews, JamUp Pro or Cali Axis Guitar Amplifier?

Cali Axis Guitar Amplifier is rated higher. JamUp Pro averages 4.6 out of 5 from 716 ratings, while Cali Axis Guitar Amplifier averages 5.0 from 7 ratings.

### Do JamUp Pro or Cali Axis Guitar Amplifier have ads?

Neither JamUp Pro nor Cali Axis Guitar Amplifier shows ads.

### Which is updated more often, JamUp Pro or Cali Axis Guitar Amplifier?

JamUp Pro ships an update every 2 months, and Cali Axis Guitar Amplifier every 38 months. Most recently, JamUp Pro was updated on October 23, 2026 and Cali Axis Guitar Amplifier on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*