# Ampero II Stage vs GP Tone Builder

The clearest difference is review sentiment: GP Tone Builder at 100% against Ampero II Stage's 57%. GP Tone Builder also leads on rating (5.0 vs 3.6) and update cadence (every 3 weeks vs every 3 months). Ampero II Stage's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. GP Tone Builder sells 1 in-app purchase, starting at $29.99 per year. Ampero II Stage asks for nothing beyond the download.

GP Tone Builder holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews point the same way: 57% of Ampero II Stage's written reviews are positive against 100% of GP Tone Builder's.

Ampero II Stage ships an update every 3 months, GP Tone Builder every 3 weeks. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Ampero II Stage | GP Tone Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (7 ratings)](https://appshunter.io/ios/app/ampero-ii-stage/id6474100710/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/gp-tone-builder/id6760564651/reviews)** |
| Number of ratings | **7** | 3 |
| Positive reviews | 57.1% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Freemium |
| Size | 224 MB | 16 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Hotone](https://appshunter.io/developer/982536111) | [aziz bou harb](https://appshunter.io/developer/1885005681) |

## What reviewers say

### Ampero II Stage

[App page](https://appshunter.io/ios/app/ampero-ii-stage/id6474100710)

Manage your amp modeler and effects processor with an intuitive interface. Access full effects chains, download and share patches from a growing community, and perform bulk operations on your presets.

**Highlights:** Full effects chain and parameter management, Download and upload patches via Hotone Community, Intuitive user interface, Bulk import/export of preset files, Batch categorization, annotation, and deletion of presets

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### GP Tone Builder

[App page](https://appshunter.io/ios/app/gp-tone-builder/id6760564651)

This app uses AI to analyze the guitar or bass tone of any song and create playable patches for your Valeton multi-effects processor. It isolates tracks, analyzes spectral features, and maps tones to your device's effects via Bluetooth.

**Highlights:** AI tone analysis for guitar and bass, Bluetooth patch transfer, Song audio separation, Multi-section tone mapping, Direct hardware integration

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $29.99 | per year |


## Frequently asked questions

### Is Ampero II Stage free?

Ampero II Stage is free to download, with no in-app purchases.

### Is GP Tone Builder free?

GP Tone Builder is free to download, with in-app purchases available.

### Which has better reviews, Ampero II Stage or GP Tone Builder?

GP Tone Builder is rated higher. Ampero II Stage averages 3.6 out of 5 from 7 ratings, while GP Tone Builder averages 5.0 from 3 ratings.

### Do Ampero II Stage or GP Tone Builder have ads?

Neither Ampero II Stage nor GP Tone Builder shows ads.

### Which is updated more often, Ampero II Stage or GP Tone Builder?

Ampero II Stage ships an update every 3 months, and GP Tone Builder every 3 weeks. Most recently, Ampero II Stage was updated on October 24, 2026 and GP Tone Builder on October 31, 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.*