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Roll Over Mozart plays four eighteenth-century musical dice games: throw the dice and the app writes and plays a piece, following the tables of the original prints by Mozart, Kirnberger, Stadler and C.P.E. Bach.
Questions, a bug, a wrong note, or a suggestion: write to aleatormusichome@gmail.com. I read everything and answer as soon as I can. It helps if you mention which composer and form you were playing, your device and its iOS version, and what you expected to happen instead.
No. Every bar was written by the composer and printed in the eighteenth century. The dice decide only the order in which the bars are played, which is exactly what the original games were for.
Nobody knows. The printed game appeared in Bonn in 1793, two years after his death, and the Köchel catalogue lists it among the doubtful works as K. Anh. C 30.01. What is certainly his is a two-page sketch from 1787, K. 516f, in which he was clearly playing with the idea. The app says as much in the info sheet for each composer.
A roll lives for as long as you keep it on screen. Use Share MIDI to keep it as a file, or share the score as a PDF from the sheet music view. Both go through the standard iOS share sheet, so you decide where they end up.
Entirely. The only things that need a connection are the two links in each composer's info sheet, which open IMSLP and Wikipedia in your browser.
iPhone and iPad running iOS 26.2 or later.
The scans of the original prints come from the British Library, the Bayerische Staatsbibliothek and the Badische Landesbibliothek, by way of IMSLP. The numbered bars are taken from those prints without a note changed. The instrument sounds come from the GeneralUser GS sound bank by S. Christian Collins.