Comparison

GP Tone Builder vs Maestrom

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

Head to head
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

About

Maestrom

Read full description

One tap by the bandleader and every musician's screen opens the same chord chart. Musicians join in seconds with a code, over the internet or a local Wi-Fi network, all in sync. Maestrom: chords, setlists and real-time band sync for live music. Tap a song and every musician's screen opens the same chart at the same moment. No internet at the venue? The sound desk's Wi-Fi router is enough: Maestrom works over the internet or a local Wi-Fi network. With its offline-first design, your songs and setlists are always at hand in rehearsal and on stage. Smart setlist tools Arrange songs by energy and program flow: opener, build-up, finale. Set key, BPM and notes per song, drag to reorder, and shape the whole night in advance. Maestro mode: lead your band on stage • Broadcast the same chart to every connected musician so everyone is on the same song • Push key and tempo changes to the whole band instantly • Send stage cues: Chorus, Solo, Extend, Back to top, Final, STOP • See each musician's connection live; if the app closes during an internet stage, return to it with the same code Musician mode: connect in seconds • Enter the 6-character code or tap the shared link, pick your instrument and join; internet or local Wi-Fi is resolved automatically • When the Maestro sends a song, your screen opens it, even if the song was never saved on your device • Browse the setlist ahead of time, see what's next and scroll your own part freely Solo mode: for solo performers • Build a program in minutes, follow lyrics and chords full screen and change key on the fly Built for cover bands, wedding and event acts, hotel, restaurant and bar gigs, choirs and any musicians who play together. Highlights • Structured chord and chart editor with transpose • Chords-only measure grid view, alternate chords, repeats and time-signature changes • Chord diagrams and metronome • Smart setlist builder (energy / program flow) • Maestro, Musician and Solo modes with real-time sync • Internet or local Wi-Fi, offline-first, zero setup • Stage cues and instrument notes; the screen stays awake on stage • Import MusicXML and iReal Pro playlists; share songs and setlists as files; export setlists as PDF • Ready-made song packs • iPhone and iPad (landscape on iPad) • Turkish and English • Dark and light themes for rehearsal and stage Song packs contain chord charts and setlist flows prepared for live-performance practice. Audio recordings and official sheet music are not included; paid packs do not include lyrics. The free pack contains public-domain songs with lyrics. With Maestrom Pro, unlock unlimited songs, setlists and live stages, and unlimited musicians per stage. All tools are included in the free plan too. On stage, everyone on the same song, in the same flow. Terms of Use (EULA): https://app.maestrom.live/terms?l=en Privacy Policy: https://app.maestrom.live/privacy?l=en

Screenshots

GP Tone Builder4 screens
Maestrom4 screens

Verdict

The call

The clearest difference is update cadence: Maestrom at weekly against GP Tone Builder's every 3 weeks. On price, ads, in-app purchases 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 and Maestrom sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

GP Tone Builder ships an update every 3 weeks, Maestrom weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 9 level
GP Tone Builder versus Maestrom: the parameters behind the verdict, then further details
ParameterGP Tone BuilderMaestrom
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size16 MB49 MB
Age rating4+4+
Developeraziz bou harbSistem Robotik Yazilim Hizmetleri LTD

In-app purchases

1 purchases

GP Tone Builder

Subscriptions1
  • Unlimited Access$29.991 Year
3 purchases

Maestrom

Subscriptions2
  • Maestrom Pro (Monthly)7 Days trial$6.991 Month
  • Maestrom Pro (Annual)7 Days trial$39.991 Year
One-time1
  • Turkish Pop Chart Pack$2.99

Questions

Is GP Tone Builder free?
GP Tone Builder is free to download, with in-app purchases available.
Is Maestrom free?
Maestrom is free to download, with in-app purchases available.
Do GP Tone Builder or Maestrom have ads?
Neither GP Tone Builder nor Maestrom shows ads.
Which is updated more often, GP Tone Builder or Maestrom?
GP Tone Builder ships an update every 3 weeks, and Maestrom weekly. Most recently, GP Tone Builder was updated on November 5, 2026 and Maestrom on October 31, 2026.

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