KeyMorph vs Piano Transpose
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KeyMorph
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KeyMorph is the ultimate practice companion for anyone playing a transposing instrument. With a full‑sized, touch‑responsive piano keyboard and a simple dropdown menu, you can choose an available instrument and immediately see the adjusted note names rendered atop each key—no mental math required. KeyMorph helps you: Visualize transposition in real time, so you always know which piano key corresponds to your instrument’s written pitch. Switch instruments effortlessly—great for multi‑instrumentalists or band directors working with different sections. Build confidence by practicing scales, chords, and melodies in their concert‑pitch form while seeing exactly what to play on your instrument. Ideal for students, educators, and professionals alike, KeyMorph makes learning and performing transposed music intuitive, accurate, and fun. Instruments Supported: Piano Violin Oboe Alto Saxophone Soprano Saxophone Tenor Saxophone Baritone Saxophone Trumpet French Horn Clarinet More instruments to come!
Piano Transpose
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Your sheet music. The right pitch. Play an alto sax part in E-flat, a trumpet melody in B-flat, or a piano accompaniment—right from your iPhone or iPad. Choose an instrument, tap the written notes, and hear them at the correct pitch. Free. No ads. Made for the love of music, not for profit. TWO KEYBOARDS ON IPAD On iPad, put tenor sax on one keyboard and alto sax on the other. Each keyboard has its own sound, tuning and volume. Demonstrate two parts together, compare instruments during a lesson, or play a piano accompaniment beneath a trumpet melody. FROM THE PAGE TO YOUR EARS Instrument-appropriate tuning is selected automatically. B-flat clarinet starts at its written E3; alto sax uses E-flat; French horn and English horn use F. Switch to concert pitch or another tuning whenever your part calls for it. Dedicated treble-clef presets cover B-flat euphonium and B-flat/E-flat tuba parts. 55 SOUNDS TO EXPLORE Discover acoustic and electric pianos, all four familiar saxophones, clarinets, flute and piccolo, trumpet, French horn, trombones, tuba, English horn, guitars, strings, celesta and more. Browse by family, search for an instrument, and save your favorites. A KEYBOARD MADE FOR PLAYING Play notes and chords with multiple fingers. Move around the instrument's range with the miniature keyboard above the keys. Use your phone in either orientation. On iPad, both keyboards keep the same key size, with note names and key-size settings applied together. FOR THE MOMENTS WHEN THE REAL INSTRUMENT ISN'T THERE Help a child hear a phrase. Check your part before rehearsal. Demonstrate a melody to a student. Explore a new instrument. Every sound is ready to play offline. Piano Transpose is a musical companion for parents, teachers and players. You read the music and play the keys; the app does not scan or import scores. No advertising. No sound packs to buy. Just music.
Screenshots
Verdict
KeyMorph and Piano Transpose are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | KeyMorph | Piano Transpose |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 31 MB | 295 MB |
| Age rating | 4+ | 4+ |
| Developer | Omni Devs | Site Logic |
In-app purchases
KeyMorph
No in-app purchases
Piano Transpose
No in-app purchases









