Comparison

KeyMorph vs Gradation Piano

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

Head to head
About

KeyMorph

Features
Read full description

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!

About

Gradation Piano

Features
Read full description

Play the piano and watch your music come alive. Gradation Piano turns every note into a burst of color. Press a key and vibrant fluid — unique to that pitch — erupts from the keyboard and swirls across the display in real time, powered by a Metal-based fluid simulation. Features Full 88-key range — scroll freely from A0 to C8 Color-coded keys — each of the 12 pitches has its own hue, making it easy to recognize notes by sight Live fluid visuals — Metal GPU simulation reacts instantly to every touch, blending colors as you play chords Adjustable keyboard width — zoom in for larger keys or zoom out to see more of the keyboard at once Multi-touch — play full chords and let the colors mix

Screenshots

KeyMorph4 screens
Gradation Piano1 screens

Verdict

The call

The clearest difference is device support: KeyMorph at 3 against Gradation Piano's 1. KeyMorph also leads on iOS requirement (15.1 vs 18.6). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 4 level
KeyMorph versus Gradation Piano: the parameters behind the verdict, then further details
ParameterKeyMorphGradation Piano
PriceFreeFree
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better18.6
Further details — not scored
Size31 MB6 MB
Age rating4+4+
DeveloperOmni DevsMASATO MISAWA

In-app purchases

None

KeyMorph

No in-app purchases

None

Gradation Piano

No in-app purchases

Questions

Is KeyMorph free?
KeyMorph is free to download, with no in-app purchases.
Is Gradation Piano free?
Gradation Piano is free to download, with no in-app purchases.
Do KeyMorph or Gradation Piano have ads?
Neither KeyMorph nor Gradation Piano shows ads.

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