Comparison

Fretuoso vs Engineering Calculator

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

Engineering Calculator

This application provides a comprehensive suite of 59 engineering calculators across civil, electrical, and mechanical disciplines. It includes formulas and descriptions for each calculator, along with convenient copy and clear functions.

Highlights
  • 59 engineering calculators
  • Civil, Electrical, Mechanical categories
  • Formulas included for each calculator
  • Descriptions for each calculator
  • Copy and clear button functionality
Features
Read full description

Engineering Calculator is an easy to use App that Contains 59 Engineering Calculators Split into 3 Categories: Civil Engineering Includes 29 Calculators: - Cantilever Beam - Pipeline Flow Rate - Cantilever Beam Slope and Deflection With Couple Moment - Cantilever Beam Slope and Deflection with Uniformly Distributed Load - Cantilever Beam Slope and Deflection Calculator For Uniform Load - Cantilever Beam Slope and Deflection Calculator for Load at Free End - Cantilever Beam Slope and Deflection Calculator for Load at Any Point - Feet (ft) and Inches (in) Arithmetic Calculator - Flexible Pavement Structural Number - Vertical Curve Offset Distance - Rate of Change of Grade on Roadways - Transportation Highways Horizontal Curve - Elevation Point of Vertical Curve on Road - Vehicle Speed Stopping Distance - Spiral / Transition Curve Tangent Distance - Spiral / Transition Curve Deflection Angle - Earthwork Cross Section Volume - Concrete Slab Maximum Length - Concrete Slab Pour Volume - Concrete Slab Maximum Wall Load - Maximum Floor Live Load Capacity - Concrete Block Footing Volume - Cubic Yards - Concrete Footing / Slab Pours - Concrete Volume - Block Wall - Concrete Material Calculator Circle - Concrete Material Calculator Rectangle - Concrete Material Calculator Triangle Electrical Engineering 18 Calculators: - Cable Length from Sag, Span - Spring Resonant Frequency - Solenoid Coil Electromagnetic Force - Capacitor Energy (E) and RC Time Constant - Physical Properties of Coil / Material - Inductance of an Air Core Coil - Parallel Resistor - Straight Wire Inductor - 8051 PIC Microcontroller Time Delay - Microstrip Transmission Lines Impedance - Electrical Admittance (Y) - Electrical Power Factor - Specific Work of Gas Turbine - 3 Phase Power Calculator by Two Wattmeters Method - Specific Work - Youngs Modulus Spring Resonant Frequency - Gear Ratio - mA/h Power Consumption Mechanical Engineering Includes 12 Calculators: - Push / Pull Hydraulic Cylinder - Square Tube - Lathe Boring Time - Lathe Drilling Time - Lathe Cutting / Tapping Time - Lathe Turning Time - Screw Thread Shear - Shear Area of Internal Screw Thread - Ultimate Tensile Stress - Maximum Deflection of Beam with Load at Center - Mohrs Circle - Turning Surface Roughness Engineering Calculator also includes: - Formula for Each Calculator - Description for Each Calculator - Copy Button - Clear Button

Screenshots

Fretuoso4 screens
Engineering Calculator4 screens

Verdict

The call

The clearest difference is review sentiment: Fretuoso at 62% against Engineering Calculator's 0%. Fretuoso also leads on price (Free vs $1.99) and rating (4.6 vs 1.0). Engineering Calculator's advantage is in-app purchases (none vs 12) and ads (none vs shown). On device support and iOS requirement 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

Fretuoso is free to download; Engineering Calculator costs $1.99 up front. Fretuoso sells 12 one-off in-app purchases. Engineering Calculator asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Fretuoso holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Fretuoso has 953 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 62% of Fretuoso's written reviews are positive against 0% of Engineering Calculator's.

UpkeepUpdate frequency

Fretuoso ships an update every 11 days, Engineering Calculator every 30 months. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.

Scorecard8 real differences · 2 level
Fretuoso versus Engineering Calculator: the parameters behind the verdict, then further details
ParameterFretuosoEngineering Calculator
PriceFree — better$1.99
Rating4.6 (953 ratings) — better1.0 (1 ratings)
Positive reviews61.9% of reviews — better0.0% of reviews
Number of ratings953 — better1
Update frequencyEvery 11 days — betterEvery 30 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size82 MB7 MB
Age rating4+4+
DeveloperCatloaf Software LLCloay setrak

Customer experience

Fretuoso

All ratings953 ratings
Positive91.1%
Neutral4.5%
Negative4.4%
Written reviews147 reviews
Positive61.9%
Neutral8.2%
Negative29.9%

Engineering Calculator

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

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

Engineering Calculator

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
None

Engineering Calculator

No in-app purchases

Questions

Is Fretuoso free?
Fretuoso is free to download, with in-app purchases available.
Is Engineering Calculator free?
Engineering Calculator costs $1.99, with no in-app purchases.
Which has better reviews, Fretuoso or Engineering Calculator?
Fretuoso is rated higher. Fretuoso averages 4.6 out of 5 from 953 ratings, while Engineering Calculator averages 1.0 from 1 ratings.
Do Fretuoso or Engineering Calculator have ads?
Fretuoso shows ads; Engineering Calculator does not.
Which is updated more often, Fretuoso or Engineering Calculator?
Fretuoso ships an update every 11 days, and Engineering Calculator every 30 months. Most recently, Fretuoso was updated on September 23, 2026 and Engineering Calculator on September 9, 2026.

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