Comparison

Fretuoso vs Calibre Project

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

Head to head
About

Fretuoso

Learn note positions on stringed instruments through an engaging game. Supports multiple instruments and offers staff training to improve sheet music reading. Practice specific fret ranges and tunings with adaptive learning.

Highlights
  • Learn note locations on fretboard
  • Supports 11 string instruments
  • Staff training for sheet music
  • Customizable practice modes
  • Flexible tuning options
  • Progress tracking and statistics
  • Adaptive learning engine
Features
Read full description

Master the Fretboard with Fretuoso Fretuoso is an engaging educational game designed to help you learn the location of notes on the fretboard of the guitar and other stringed instruments. With support for eleven instruments—including 4, 5, and 6-string basses, mandolin, ukulele, and banjo—you can expand your musical knowledge no matter your instrument of choice. How It Works Presented with random notes on the fretboard, you choose the correct answer from multiple options. Simply tap the right button to score points and improve your skills! The new Staff Training Mode helps you learn the positions of notes on the musical staff relative to your instrument’s fretboard, making reading sheet music a breeze. Features • Train Your Ear and Mind: Enhance your auditory skills while deepening your understanding of your instrument. • Learn Sheet Music: Master the positions of notes on the musical staff; say goodbye to tabs! • Eleven Realistic Instruments: Choose from 4 guitars, 3 basses, mandolin, ukulele, and banjo—all with beautiful, lifelike graphics. • Customized Training: Focus on specific fret ranges or string subsets to target your practice. • Flexible Tunings: Use built-in common tunings or create your own custom tunings. • Progress Visualization: Track your improvement with detailed statistics for every fret. • Smart Learning Engine: The app adapts to focus on areas where you need more practice. • Competitive Play: Enjoy Game Mode with levels of increasing difficulty, compete with friends, and share your achievements via Game Center. • Left-Handed Mode: Fully compatible with left-handed players. What Artists Are Saying “Learning the notes on the fretboard is key to any guitarist’s development, and Fretuoso is a neat way to get that info burned into your brain without having to carry a guitar everywhere you go. Pretty cool!” — Bryan Beller (The Aristocrats, Steve Vai, Mike Keneally) “This is one of the best apps I’ve seen in a while. It’s simple, fun, and educational. Very useful for guitar players, as many tend to play by ear and not focus on knowing the fretboard.” — Rick Musallam (Mike Keneally, Gryphon Labs) Unlock Full Access This version offers free access to only part of each available instrument. Unlock the full potential of Fretuoso with a Premium subscription, including every instrument, level, and feature, ad-free! Terms Of Service (EULA): https://fretuoso.app/terms/

About

Calibre Project

Features
Read full description

Learn how mechanical watches work with the official Calibre Project App. - You can easily access your courses on your mobile at your own pace. - Watch your educational videoes, read content and test your knowledge when and where you want to. - Switch between desktop to mobile without losing your course program.

Screenshots

Fretuoso4 screens
Calibre Project4 screens

Verdict

The call

The clearest difference is ads: Calibre Project at none against Fretuoso's shown. Calibre Project also leads on iOS requirement (15.2 vs 17.0). Fretuoso's advantage is update cadence (every 9 days vs every 6 weeks). On price, 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. Fretuoso sells 12 one-off in-app purchases and Calibre Project sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Fretuoso ships an update every 9 days, Calibre Project every 6 weeks. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard3 real differences · 7 level
Fretuoso versus Calibre Project: the parameters behind the verdict, then further details
ParameterFretuosoCalibre Project
PriceFreeFree
Rating4.6 (954 ratings) — better—
Positive reviews63.8% of reviews—
Number of ratings954 — better—
Update frequencyEvery 9 days — betterEvery 6 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.2 — better
Further details — not scored
Size82 MB102 MB
Age rating+44+
DeveloperCatloaf Software LLCFraction AS

Bugs and requests

Fretuoso

Reported bugs

5 issues
  • Restore purchases not working
  • Sound not working
  • Crashes and freezes
  • Incorrect note display
  • Syncing issues

Requested features

5 requests
  • Allow adjusting fret marker positions
  • Add 'play the fret' mode
  • Improve randomness of note selection
  • Provide more tuning and instrument options
  • Add landscape mode support

Calibre Project

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

Fretuoso

One-time12
  • 8-String Guitar$3.99
  • 12-String Guitar$3.99
  • Guitar$39.90
Show 9 more
  • Bass Guitar$39.90
  • Banjo$39.90
  • Mandolin$39.90
  • Ukulele$39.90
  • 7-String Guitar$39.90
  • 5-String Bass Guitar$39.90
  • 6-String Bass Guitar$39.90
  • Acoustic Guitar$39.90
  • All Instruments$89.90
1 purchases

Calibre Project

One-time1
  • Calibre Learning Kit$299.99

Questions

Is Fretuoso free?
Fretuoso is free to download, with in-app purchases available.
Is Calibre Project free?
Calibre Project is free to download, with in-app purchases available.
Do Fretuoso or Calibre Project have ads?
Fretuoso shows ads; Calibre Project does not.
Which is updated more often, Fretuoso or Calibre Project?
Fretuoso ships an update every 9 days, and Calibre Project every 6 weeks. Most recently, Fretuoso was updated on October 29, 2026 and Calibre Project on October 27, 2026.

Other comparisons