Comparison

Music Calculator vs Transposer Pro

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

Head to head
About

Music Calculator

This app allows musicians to input musical notation and instantly hear it played back with accurate pitch and timing. It's designed for practicing difficult passages, improving sight-reading, and building musical confidence through features like slowing down playback and looping sections.

Highlights
  • Input and play back musical notation
  • Accurate pitch, timing, and tempo playback
  • Slow down and loop passages for practice
  • Calculator-style interface for intuitive input
  • Supports complex rhythms and tuplets
  • 25 realistic instrument sounds
  • Save and load musical passages
Features
Read full description

A sketchpad for music, for practice and for composing. Notes go in on a keypad as quick as a calculator, and play back exactly as written. FOR PRACTICE Copy out what you're learning: an exercise, a few difficult measures, the piece your teacher assigned. Hear how it should sound, then slow it down, loop it, and raise the tempo as you improve. Pianists can write both hands on a grand staff, and choirs can write out all four parts and hear them together. Check your rhythm counting or your harmony homework by ear. The keypad is simple enough for children to use, and the selected note's name, such as F#, shows on its key as you write. FOR COMPOSING Write down a melody, a chord progression or a four-part harmony before you forget it, and hear every part played back with real instrument sounds. Use one instrument or several, with up to four voices on each staff, and keep every idea in your library. HOW IT WORKS Tap a note value to add a note, drag up or down to set its pitch, and drag sideways for sharps and flats. The keys are large, so there are no toolbars of tiny icons and no stylus. WRITE IT • Notes and rests from double whole notes to 128th notes, with up to three dots • Chords, and up to four voices per staff, each in its own color with stems placed for you • Several parts, each with as many staves as it needs: a piano grand staff, SATB on two staves, a duet, a small group • Treble, bass, alto and tenor clefs, with clef changes anywhere • Every key signature, chosen from an interactive circle of fifths, with key changes anywhere • Simple and compound time signatures, and a pickup measure where a piece starts with one • Ties, accidentals, staccato, accents and tenuto • Triplets, quintuplets and nested tuplets • Automatic beaming HEAR IT • Precise playback in pitch, rhythm and tempo, looping continuously • Long-press play to set the tempo, from 30 to 240 BPM, even while the music plays: slow a passage down as far as you need, then raise the tempo as your playing improves • 25 instrument sounds, from grand piano and harpsichord to strings, brass, woodwinds, harp and guitar • Two metronome channels and a volume for every part • The score glides along as it plays and each note lights up as it sounds KEEP AND SHARE IT Every passage is saved to your library and named for you. Import MusicXML (.musicxml, .xml, .mxl) from other notation apps, with its notes, rhythms, keys and clefs, and export MusicXML to finish a piece in desktop notation software. Built for iPhone, one-handed, and for iPad, with a full-width keypad and a library sidebar. Pinch or double-tap to zoom. There are no ads and no account to create, and your music stays on your device. WHAT IT ISN'T Music Calculator is built for short passages and ideas, not symphonies. It doesn't do dynamics, slurs, lyrics or chord symbols, print or export PDFs, export audio or MIDI, or scan sheet music. If you need those, a desktop engraving program is the right tool. If you want to write a passage down and hear it in seconds, this is. TRY IT FREE To use Music Calculator, choose a monthly or annual subscription, each with a 7-day free trial for new subscribers, or a one-time lifetime purchase. The subscription is called Music Calculator Pro on Apple's purchase sheet and in your Apple Account settings. Payment is charged to your Apple Account at confirmation of purchase, or at the end of the free trial. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. You can manage or cancel subscriptions in your Apple Account settings. Any unused portion of a free trial is forfeited when you buy a subscription. Privacy Policy: https://music-calculator.app/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Transposer Pro

Features
Read full description

This app is designed to show how a note written for a given instrument (e.g. a Clarinet in Bb) would be written on another instrument (e.g. a Horn in F). - Intended for music students, conductors, composers and anybody who wants to get quicker at reading scores - Choose from over 100 instruments to transpose - many with configurable keys and clefs - Use the slider to interactively see the result of the transposition - Includes info on instrument ranges and transposition properties - Supports 4 clefs (automatically selected based on instrument conventions and register) - Includes guidance on the fundamentals of reading transposing instruments - Supports dark and light themes

Screenshots

Music Calculator4 screens
Transposer Pro4 screens

Verdict

The call

The clearest difference is price: Music Calculator at Free against Transposer Pro's $0.99. Music Calculator also leads on update cadence (every 10 days vs every 11 months). Transposer Pro's advantage is in-app purchases (none vs 3) and iOS requirement (16.3 vs 18.0). On 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

Music Calculator is free to download; Transposer Pro costs $0.99 up front. Music Calculator sells 3 in-app purchases, starting at $2.99 per month. Transposer Pro asks for nothing beyond the download.

UpkeepUpdate frequency

Music Calculator ships an update every 10 days, Transposer Pro every 11 months. Both last shipped on October 25, 2026.

Scorecard4 real differences · 6 level
Music Calculator versus Transposer Pro: the parameters behind the verdict, then further details
ParameterMusic CalculatorTransposer Pro
PriceFree — better$0.99
Rating4.0 (2 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings2 — better—
Update frequencyEvery 10 days — betterEvery 11 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.3 — better
Further details — not scored
Size53 MB3 MB
Age rating4+4+
DeveloperJET Powered Apps Ltd.Matt Welch

In-app purchases

3 purchases

Music Calculator

Subscriptions2
  • Monthly7 Days trial$2.991 Month
  • Annual7 Days trial$19.991 Year
One-time1
  • Music Calculator Pro$49.99
None

Transposer Pro

No in-app purchases

Questions

Is Music Calculator free?
Music Calculator is free to download, with in-app purchases available.
Is Transposer Pro free?
Transposer Pro costs $0.99, with no in-app purchases.
Do Music Calculator or Transposer Pro have ads?
Neither Music Calculator nor Transposer Pro shows ads.
Which is updated more often, Music Calculator or Transposer Pro?
Music Calculator ships an update every 10 days, and Transposer Pro every 11 months. Most recently, Music Calculator was updated on October 25, 2026 and Transposer Pro on October 25, 2026.

Other comparisons