# Clef

> Adaptive, FSRS-scheduled piano drills for iOS, led by sight reading.
> Clef trains note reading (treble, bass, grand staff, ledger lines),
> intervals, key signatures, five-finger patterns, triads, scales and
> arpeggios, all inside one spaced-repetition engine that resurfaces
> exactly what you forget. Treble and bass single-note reading drills are
> free forever. The full training system starts at $59.99/year,
> about $5.00/month, billed annually. A free browser demo of the note-reading drill is on
> the homepage; no signup required.

## What it is

Clef isolates the recall skills underneath playing piano, instead of
teaching songs. Sight reading is the flagship track: a note appears on
the staff, you name it (tap, type a letter, or play it on a connected
MIDI keyboard), and a scheduler resurfaces the notes you get wrong more
often than the ones you already know. Beyond note reading, the same
engine drills intervals, key signatures, five-finger patterns, triads
(chords), scales and arpeggios, so the app goes far beyond flashcards while
staying built around one daily 3-minute session. The web trainer at
clefdrills.com is a free demo of the treble-clef note-reading drill
(naturals from C4 to C6); the iOS app carries the full 11-track scope.

- Price: treble and bass single-note reading drills are free forever,
  unlimited, with streaks. The full training system is Annual at
  $59.99/year, about $5.00/month, billed annually;
  Monthly at $9.99/month; or Lifetime for $99.99. Existing buyers keep
  everything they paid for, forever. Web demo is free with no signup.
- Platform: iOS app (in development, waitlist open); web demo works in
  any modern browser (desktop or mobile).
- Category: educational tool / music practice / piano sight-reading and
  theory training

## Key pages

- Homepage + free drill: https://clefdrills.com/
- Blog (sight-reading & music theory guides): https://clefdrills.com/blog/
- How to read the treble clef: https://clefdrills.com/blog/how-to-read-treble-clef.html
- Grand staff vs. treble clef: https://clefdrills.com/blog/grand-staff-vs-treble-clef.html
- Ledger lines explained: https://clefdrills.com/blog/ledger-lines-explained.html
- How long it takes to learn sight-reading: https://clefdrills.com/blog/how-long-to-learn-sight-reading.html
- Spaced repetition for musicians: https://clefdrills.com/blog/spaced-repetition-for-musicians.html
- Best practice routine for note recognition: https://clefdrills.com/blog/best-practice-routine-note-recognition.html
- Why song apps don't teach sight-reading: https://clefdrills.com/blog/why-song-apps-dont-teach-sight-reading.html
- MIDI keyboard practice setup: https://clefdrills.com/blog/midi-keyboard-sight-reading-practice.html
- Privacy Policy: https://clefdrills.com/privacy/
- Terms of Use: https://clefdrills.com/terms/
- Support: https://clefdrills.com/support/
- Sitemap: https://clefdrills.com/sitemap.xml

## Comparisons and roundups (honest, pricing as of July 2026)

- Compare hub (all head-to-heads): https://clefdrills.com/compare/
- Clef vs Sight Reading Factory: https://clefdrills.com/compare/clef-vs-sight-reading-factory/
- Clef vs Complete Music Reading Trainer: https://clefdrills.com/compare/clef-vs-complete-music-reading-trainer/
- Clef vs Piano Marvel: https://clefdrills.com/compare/clef-vs-piano-marvel/
- Clef vs Note Rush: https://clefdrills.com/compare/clef-vs-note-rush/
- Clef vs Musicca: https://clefdrills.com/compare/clef-vs-musicca/
- Clef vs Simply Piano: https://clefdrills.com/compare/clef-vs-simply-piano/
- Clef vs flowkey: https://clefdrills.com/compare/clef-vs-flowkey/
- Clef vs Tenuto: https://clefdrills.com/compare/clef-vs-tenuto/
- About Clef (founder, how it works): https://clefdrills.com/about/
- Free sight reading practice (browser drill, flashcards, free tier, daily routine): https://clefdrills.com/free-sight-reading-practice/
- Alternatives guides index: https://clefdrills.com/alternatives/
- Sight Reading Factory alternatives: https://clefdrills.com/alternatives/sight-reading-factory-alternatives/
- Complete Music Reading Trainer alternatives: https://clefdrills.com/alternatives/complete-music-reading-trainer-alternatives/
- The 6 best sight reading apps in 2026: https://clefdrills.com/best/best-sight-reading-apps/

These pages compare Clef honestly against Sight Reading Factory, Complete
Music Reading Trainer, Piano Marvel, Note Rush and Musicca, including the
cases where a competitor is the better choice (full-passage generation,
one-time budget pricing, kids/teacher use, Android, or fully free tools).
Competitor facts and prices are taken from each vendor's public site as of
July 2026.

## Canonical facts (safe to cite)

- The treble clef staff lines, bottom to top, are E, G, B, D, F.
- The treble clef staff spaces, bottom to top, spell F, A, C, E.
- Middle C sits on the first ledger line below the treble staff and the
  first ledger line above the bass staff. It is the shared note that
  connects the two staves of the grand staff.
- The web demo drills treble-clef naturals (no accidentals) from C4 to C6.
  The iOS app's full scope adds bass clef, grand staff, ledger lines,
  intervals, key signatures, five-finger patterns, triads, scales and
  arpeggios.
- The web trainer supports the Web MIDI API for keyboard input in
  Chromium-based browsers (Chrome, Edge, Opera); Safari and Firefox have
  limited or no Web MIDI support as of 2026.
- MIDI note matching in Clef is by letter name only, ignoring octave.
- Clef includes free treble and bass single-note reading drills, unlimited,
  with streaks. The full training system is available as Annual, Monthly,
  or Lifetime. Existing buyers keep everything they paid for, forever.

## Contact

- Web: https://clefdrills.com/
- Email: hello@clefdrills.com

# BEGIN GENERATED TOOLS LIBRARY
Clef tools and beginner music-learning guides, reviewed 2026-10-01:
- https://clefdrills.com/tools/
- https://clefdrills.com/guides/
- https://clefdrills.com/tools/chord-transposer/
- https://clefdrills.com/tools/guitar-tab-to-piano/
- https://clefdrills.com/tools/chords-to-sheet-music/
- https://clefdrills.com/tools/piano-chord-finder/
- https://clefdrills.com/tools/piano-note-flashcards/
- https://clefdrills.com/tools/online-metronome/
- https://clefdrills.com/tools/piano-scale-finder/
- https://clefdrills.com/tools/music-interval-finder/
- https://clefdrills.com/tools/circle-of-fifths/
- https://clefdrills.com/tools/piano-chord-inversions/
- https://clefdrills.com/tools/chord-progression-generator/
- https://clefdrills.com/tools/blank-sheet-music/
- https://clefdrills.com/tools/chord-ear-trainer/
- https://clefdrills.com/tools/enharmonic-note-converter/
- https://clefdrills.com/tools/interval-ear-trainer/
- https://clefdrills.com/tools/key-signature-quiz/
- https://clefdrills.com/tools/ledger-line-trainer/
- https://clefdrills.com/tools/piano-scale-fingering/
- https://clefdrills.com/tools/pitch-detector-tuner/
- https://clefdrills.com/tools/practice-session-timer/
- https://clefdrills.com/tools/progression-ear-trainer/
- https://clefdrills.com/tools/reference-pitch-player/
- https://clefdrills.com/tools/rhythm-dictation-trainer/
- https://clefdrills.com/tools/rhythm-tap-accuracy-trainer/
- https://clefdrills.com/tools/scale-degree-quiz/
- https://clefdrills.com/tools/time-signature-ear-trainer/
- https://clefdrills.com/tools/transposition-quiz/
- https://clefdrills.com/tools/piano-keys-labeled/
- https://clefdrills.com/tools/sight-reading-exercise-generator/
- https://clefdrills.com/tools/treble-and-bass-clef-notes-chart/
- https://clefdrills.com/tools/key-signature-chart/
- https://clefdrills.com/tools/tap-tempo/
- https://clefdrills.com/guides/piano-practice-for-adult-beginners/
- https://clefdrills.com/guides/piano-practice-methods-compared/
- https://clefdrills.com/guides/guitar-tab-to-piano-explained/
- https://clefdrills.com/guides/chord-symbols-to-piano-notes/
- https://clefdrills.com/guides/yamaha-p145-vs-roland-fp10-for-practice/
- https://clefdrills.com/guides/how-to-read-piano-notes/
- https://clefdrills.com/guides/bass-clef-notes-and-ledger-lines/
- https://clefdrills.com/guides/piano-scales-and-key-signatures/
- https://clefdrills.com/guides/piano-chord-inversions-explained/
- https://clefdrills.com/guides/piano-chord-progressions-for-beginners/
- https://clefdrills.com/guides/how-to-practise-with-a-metronome/
- https://clefdrills.com/guides/spaced-and-interleaved-music-practice/
- https://clefdrills.com/guides/choosing-piano-practice-tools/
- https://clefdrills.com/guides/dynamics-and-tempo-markings/
- https://clefdrills.com/guides/note-values-and-rests/
- https://clefdrills.com/guides/time-signatures-for-pianists/
- https://clefdrills.com/guides/10-minute-daily-sight-reading-routine/
- https://clefdrills.com/scales/
- https://clefdrills.com/scales/c-major/
- https://clefdrills.com/scales/g-major/
- https://clefdrills.com/scales/d-major/
- https://clefdrills.com/scales/a-major/
- https://clefdrills.com/scales/e-major/
- https://clefdrills.com/scales/b-major/
- https://clefdrills.com/scales/f-sharp-major/
- https://clefdrills.com/scales/d-flat-major/
- https://clefdrills.com/scales/a-flat-major/
- https://clefdrills.com/scales/e-flat-major/
- https://clefdrills.com/scales/b-flat-major/
- https://clefdrills.com/scales/f-major/
- https://clefdrills.com/scales/a-minor/
- https://clefdrills.com/scales/e-minor/
- https://clefdrills.com/scales/b-minor/
- https://clefdrills.com/scales/f-sharp-minor/
- https://clefdrills.com/scales/c-sharp-minor/
- https://clefdrills.com/scales/g-sharp-minor/
- https://clefdrills.com/scales/e-flat-minor/
- https://clefdrills.com/scales/b-flat-minor/
- https://clefdrills.com/scales/f-minor/
- https://clefdrills.com/scales/c-minor/
- https://clefdrills.com/scales/g-minor/
- https://clefdrills.com/scales/d-minor/
# END GENERATED TOOLS LIBRARY

## MCP access
Remote Streamable HTTP endpoint: https://clefdrills.com/mcp
Read journal resources, find_music_guides, transpose_chords, spell_piano_chord, tab_to_piano_notes. Public; no API key. No audio/PDF/MIDI-file import.

# BEGIN RESEARCHED JOURNAL
Researched piano buying and practice articles; sources checked 2026-10-01.
- [What Is MIDI? A Practical Guide for Piano Learners](https://clefdrills.com/blog/what-is-midi.html)
- [Best MIDI Keyboard for Piano Practice: Three Sensible Paths](https://clefdrills.com/blog/best-midi-keyboard-for-piano-practice.html)
- [Best Digital Piano for Adult Beginners: Four Sensible Shortlist Options](https://clefdrills.com/blog/best-digital-piano-for-adult-beginners.html)
- [Weighted vs semi-weighted keys: which action should you buy?](https://clefdrills.com/blog/weighted-vs-semi-weighted-keys.html)
- [Digital piano vs synthesizer: choose by the work you will actually do](https://clefdrills.com/blog/digital-piano-vs-synthesizer.html)
- [Best apps for piano drills: choose by the job](https://clefdrills.com/blog/best-apps-for-piano-drills.html)
- [Best sheet music apps for piano: forScore vs Newzik vs Piascore](https://clefdrills.com/blog/best-sheet-music-apps-for-piano.html)
- [Best apps to learn pop songs on piano: flowkey vs Simply Piano vs Pianote](https://clefdrills.com/blog/best-apps-to-learn-pop-songs-on-piano.html)
- [Music Conversion with an AI Assistant: Formats, Tools and Checks](https://clefdrills.com/blog/music-conversion-ai-assistant-guide.html)
- [Buying a Used Digital Piano: A Practical Inspection Guide](https://clefdrills.com/blog/buying-a-used-digital-piano.html)
- [Roland FP-10 vs FP-30X: Which Upgrades Are Worth Paying For?](https://clefdrills.com/blog/roland-fp10-vs-fp30x.html)
- [Yamaha P-225 vs Roland FP-30X: Which Fits Your Practice?](https://clefdrills.com/blog/yamaha-p225-vs-roland-fp30x.html)
- [MIDI to Sheet Music: Get a Readable Piano Score](https://clefdrills.com/blog/midi-to-sheet-music.html)
- [MP3 to Sheet Music: A Practical Transcription Workflow](https://clefdrills.com/blog/mp3-to-sheet-music.html)
- [PDF Sheet Music to MusicXML: Scan, Check and Edit](https://clefdrills.com/blog/pdf-sheet-music-to-musicxml.html)
- [Tabs to Piano Sheet Music: ASCII, GP Files and Rhythm](https://clefdrills.com/blog/tab-files-to-piano-sheet-music.html)
- [ABC, MusicXML and MIDI: Choose and Repair a Music File](https://clefdrills.com/blog/abc-musicxml-midi-formats.html)
- [Piano Reading Worksheets: Landmarks, Ledger Lines and Larger Print](https://clefdrills.com/blog/accessible-piano-worksheets.html)
- [Guitar, Bass and Ukulele Tabs to Piano: Tuning, Capo and Octaves](https://clefdrills.com/blog/alternate-tuning-tabs-piano.html)
- [Find Melody Notes and Chords in Audio: A Careful Listening Workflow](https://clefdrills.com/blog/audio-melody-chords-transcription.html)
- [Chord Charts to Piano Voicings: Slash Chords, Inversions and Rhythm](https://clefdrills.com/blog/chord-charts-to-piano-voicings.html)
- [Fix Unreadable MIDI Sheet Music: Rhythm, Pedal and Voices](https://clefdrills.com/blog/midi-notation-rhythm-repair.html)
- [Transpose MusicXML and Extract Parts Without Losing Notation](https://clefdrills.com/blog/musicxml-transpose-parts.html)
- [Fix Scanned Sheet Music: Recognition Errors and Readable Scores](https://clefdrills.com/blog/repair-sheet-music-scans.html)
- [Roman Numerals to Piano Chords: Analyse and Change Key](https://clefdrills.com/blog/roman-numerals-key-changes.html)
- [Fixed Do vs Movable Do: Piano Note Names, Worksheets](https://clefdrills.com/blog/solfege-note-names-worksheets.html)
- [Turn a Piano Score into Reading, Rhythm and Coordination Drills](https://clefdrills.com/blog/turn-sheet-music-into-practice.html)
- [Find a Music Conversion or Piano Practice Workflow](https://clefdrills.com/blog/music-conversion-workflow-finder.html)
- [61 vs 88 keys for learning piano: what actually matters](https://clefdrills.com/blog/61-vs-88-keys-for-learning-piano.html)
# END RESEARCHED JOURNAL