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By Keijiro Takahashi

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Bouncing balls turn into music!

Arpie is the novel musical composition system. Put balls as many as you like, and watch as they make nice music. Higher balls hit the keys with long pauses, as opposed to lower balls which hit fast and repeatedly. By combining them you can easily make a wide variety of musical sequences.


iPhone Screenshot 1
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iPad Screenshot 1
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Customer Reviews

"fair", but 1 step away from being great

A great, intuitive, entertaining app for building nice sounding ambient music and arpeggios. ******* BUT! one HUGE element is lacking and if it was added, it would be a shining class-leading app. And it would be extremely easy to modify: instead of showing simplistic alternating adjacent notes ambiguously labeled, simply use the white/black key format of a standard piano so the user can actually select notes deliberately and compose with this app.

A slice of tenori-on fun!

Simple. Fun. Cute. Can be complex and chaotic or subtle and sublime. Cool little toy, tool, what have you. I hope more tones are on the way...with more fun animations! Would be cool if you had balls moving sideways/left-right that could interact with the bouncing balls in some way. Maybe move them to an adjacent block? Or some other random act? Having fun thanks!


I love music apps … from the complicated to the simple. This is simple fun, and will stick around on my iPad until it gets old ... but for now … I'm loving it!

View In iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Music
  • Released:
  • Version: 1.0
  • Size: 10.5 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version: