Marek Dworecki
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Sheetly

An Android app for reading sheet music from PDFs: a Bluetooth pedal, a metronome, setlists and a practice journal, in six languages.

The Sheetly reader showing the first page of Chopin’s Ballade in G minor.
The reader: Chopin’s Ballade in G minor

Problem

A musician playing from sheet music on a tablet has their hands full, so the reader has to work with a pedal and stay out of the way on screen. Sheetly pairs a PDF reader with a library of pieces and practice tools.

What it does

  • A library with folders and search, and import of sheet-music PDFs.
  • A reader with page turning, half-page turning included, and Bluetooth pedal support that learns the pedal’s buttons.
  • A metronome with tap tempo, a timer and a practice journal.
  • Setlists, layers and recordings attached to pieces.
  • Import from IMSLP and backup.
  • An interface in six languages: Polish, English, German, French, Italian and Spanish.
The library with composer folders and a list of pieces with page counts., Open full size (new tab)
The library: composer folders

Technical decisions

Language from the device, not the code

Dates, practice time and chart labels take their language from the device configuration instead of a hard-coded Polish. A device in an unsupported language gets English, and lint catches a missing translation when a release is built.

Musical terms checked against sources

I checked translations of terms such as setlist, tap tempo and page-turning pedal against sources, including sheet-music apps’ own sites and a Henle Library leaflet, and recorded the results in the docs. Some terms still await review by musicians who are native speakers.

Tools stay on screen

The bar with the metronome and timer can stay visible, with the page fitting between the bars. Tapping the score does not hide it, since you cannot reach for it mid-piece, so it collapses with a button in the bar.

Settings: theme, a choice of six languages, the reader toolbar and the page-turning pedal., Open full size (new tab)
Settings: language and pedal

Outcome

Version 0.10.1, from 11 October 2026, has 273 strings in six languages. Before 1.0, what remains is a vocabulary review by native-speaker musicians and moving texts with counts to proper plural forms.