A piano theory app you can actually play
Most theory apps are quizzes: you tick the right answer and forget it by the next day. Notimo connects every chapter to the keyboard — you read the concept, then play it, and the app tells you instantly whether it landed. 19 chapters, from note values to the circle of fifths.
- 19 theory chapters
- Free to start
- In your browser
- With a MIDI keyboard
Why most piano theory apps do not stick
Theory taught as multiple-choice is theory you forget. You can name an interval on a card and still not recognise a sixth when it is under your fingers — because naming and playing are different skills, and only one of them is what you need at the piano.
The fix is not more flashcards. It is practising theory where it applies: on the keys, with sound, immediately after reading the idea.
What the 19 chapters cover
The course runs from the absolute basics to the material you need for classical repertoire. You can read it end to end or jump to the chapter you are stuck on.
- Foundations: notes and the staff, clefs, note values, accidentals
- Building blocks: intervals, scales, chords, keys and key signatures
- Time: time signatures, rhythmic phenomena, dynamics and tempo
- Harmony: the circle of fifths, transposition, cadences, functional harmony
- Musicianship: form and structure, expression and interpretation, style periods, ear training
Theory that connects to the keys
Every concept has somewhere to land. Read what a major third is, then play one — Notimo detects the notes through your MIDI keyboard or the on-screen piano and confirms it in real time. The same goes for scales, chords and cadences.
That loop is the whole point: read it, play it, hear it, and the idea has three places to stick instead of one.
- Works with any USB or Bluetooth MIDI keyboard — no drivers, no install
- Or use the on-screen piano if you have no keyboard yet
- Note names in 9 languages, including Solfège and German naming
- Scales and chord training as separate practice modes
Theory and sight-reading belong together
Theory explains why the notes are where they are; sight-reading turns that into speed. Learning them separately is the slow route — the concept stays abstract, and the reading stays mechanical.
Notimo runs both in one place: 370 structured levels for reading, 19 chapters for understanding, and a graded sight-reading score that shows whether it is actually working.
Frequently asked questions
Is there a free piano theory app?
Notimo is free to start — 15 lessons, the sight-reading game and the daily challenges stay free permanently, with no credit card. Notimo Pro unlocks the complete theory course, all 370 levels and the training modes.
Do I need to know theory before learning piano?
No, and you should not wait for it. Theory works best alongside playing: learn the notes you are actually using. The first chapters — notes and the staff, clefs, note values — are enough to start, and the rest builds as you go.
Do I need a MIDI keyboard for the theory course?
No. The on-screen piano works for every chapter. A USB or Bluetooth MIDI keyboard makes it better, because you practise on real keys and Notimo detects every note you play in real time.
Which theory topics does Notimo cover?
All 19 chapters: notes and the staff, clefs, note values, accidentals, intervals, scales, chords, keys and key signatures, time signatures, the circle of fifths, transposition, dynamics and tempo, cadences, functional harmony, form and structure, rhythmic phenomena, expression and interpretation, style periods, and ear training.
Keep reading & practising
Start with theory today
Free, right in your browser. Read a chapter, play it on the keys, hear it click.