Comparison

Ampero II Stage vs GP Tone Builder

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ampero II Stage

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
Read full description

This app is designed to manage the Hotone Ampero II Stage Amp Modeler/Effects Processor. With the app you can get access to full effects chain/parameters, download/upload patches via Hotone Community, etc. • Intuitive Ul The Ampero II Stage app features a straight forward, intuitive user interface which makes tweaking parameters a breeze. • The growing community Sigh in with a Hotone account so you can launch Hotone Community to view Ampero II Stage's growing patch library, download the patches made by worldwide players/artists or just share your stellar patches. • Bulk operations You can not only import/export preset files in bulk through this app, but also batch categorize, annotate, delete, and so on your presets. For more Ampero II Stage information: www.hotoneaudio.com *Bluetooth® is a trademark owned by the Bluetooth SIG, Inc. This trademark was used merely to identify a functional characteristic of the product.

About

GP Tone Builder

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
Read full description

GP Tone Builder uses AI to analyze the guitar and bass tone of any song and map it directly to the effects and parameters on your Valeton multi-effects processor. Search for a song, pick guitar or bass, and the app does the rest — from audio separation to tone analysis to sending the patch straight to your device over Bluetooth. HOW IT WORKS 1. Enter a song name and select Guitar or Bass. 2. The app downloads the audio and isolates the guitar or bass track using AI-powered stem separation. 3. Advanced audio analysis extracts spectral features, detects the key, and identifies distinct tone sections — clean intros, overdriven verses, distorted choruses, and more. 4. AI maps the analyzed tone to the exact effects, amp models, and parameter values available on your Valeton processor. 5. Send the patch to your device instantly via Bluetooth Low Energy. DETAILED TONE ANALYSIS Every song is broken down into multiple tone sections, so you get a patch for each part of the song, not just a single average. CHOOSE YOUR SIGNAL CHAIN Build every patch around a full amp head and cabinet, or around SnapTone captures — switch between Amp+Cab and SnapTone before you analyze, and the whole chain is built for the one you chose. DOWNLOAD AND KEEP YOUR PATCHES Save any patch as a preset file to your device. Load it later, keep a library of your favourites, or transfer it however you like — the patch is yours once it's built. BUILT FOR YOUR VALETON HARDWARE GP Tone Builder uses the same effects, amp models, and parameter ranges as the official Valeton firmware. Every patch is built from the ground up for the specific processor you own. BLUETOOTH CONNECTIVITY Pair your processor and send patches directly from the app. No cables, no file transfers, no manual entry. SUPPORTED DEVICES - Valeton GP-5 - Valeton GP-50 - Valeton GP-150 - Valeton GP-180 SUBSCRIPTION Try free with 3 song analyses. Continue with $29.99/year for unlimited access. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.bouharb.com/privacy.html

Screenshots

Ampero II Stage4 screens
GP Tone Builder4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Ampero II Stage versus GP Tone Builder: the parameters behind the verdict, then further details
ParameterAmpero II StageGP Tone Builder
PriceFreeFree
Rating3.6 (7 ratings)5.0 (3 ratings) — better
Positive reviews57.1% of reviews100.0% of reviews — better
Number of ratings7 — better3
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFreemium
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size224 MB16 MB
Age rating17+4+
DeveloperHotoneaziz bou harb

Customer experience

Ampero II Stage

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews7 reviews
Positive57.1%
Neutral0.0%
Negative42.9%

GP Tone Builder

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Ampero II Stage

No in-app purchases

1 purchases

GP Tone Builder

Subscriptions1
  • Unlimited Access$29.991 Year

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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