Train
No clock. Hints after misses. The deck quietly reshuffles around your weaknesses. This is where the work happens.
⟢ real-time MIDI ⟣⟢ 7 modes + arcade ⟣⟢ one-time purchase ⟣
Slay every
note
MidiSlayer listens to your MIDI piano and judges every note in real time. Train like it matters, play like it's a game, own it forever.
macOS Windows Steam launching 2026
How it works
See it. Play it. Go again.
Every mode is the same honest loop: a prompt on the staff, your real piano, an instant verdict. Misses come back until they stop being misses.
A note appears. You play it. The app already knows.
…plus Scales, Arpeggios and Progressions. Seven modes, one loop.
The system
Two gears. One long memory.
Train and Exam run on every mode. Underneath both, the engine keeps score of every single attempt and aims your practice where it pays.
Exam
Timed. No hints. Difficulty and speed decide the score, and the score decides your rank. Nerves included free of charge.
The algorithm holds a grudge
Every attempt feeds it. The engine learns which notes slow you down and deals them back more often, spacing the reps so they stick. As you improve, it adapts and moves the pressure somewhere new. You don't manage any of this. You just notice the misses thinning out.
- Maestro100,000 pts
- Virtuoso28,000 pts
- Musician7,000 pts
- Apprentice1,500 pts
- Novice0 pts
Every skill ranks separately. Reading the staff and naming notes are different muscles, so each climbs its own ladder, and your headline rank is simply the highest peak you've reached. The top is a real grind.
The arcade wing
Practice that plays like a game.
The same reading skill, dressed in arcade dopamine: lives, a 3-2-1 countdown, score popups, and a separate game rank that runs Rookie to Legend. You came to practise. You stayed because you were two points off your best.
Cascade
proNotes scroll along a real staff toward the now-line. Read ahead, play each one before it breaches, survive the speed. The Intervals difficulty stacks two-note chords. This is the one that eats evenings.
Blitz
freeRead the note, play it before the timer drains. The speed keeps climbing and you only get three lives.
Daily Challenge
freeOne seeded run per day, the same sequence for every player on Earth. Settle arguments.
Gold notes · ×3 scoreExtra lifeFreeze · time stops special notes spawn mid-run
Download for free
Blitz and the Daily Challenge are in the free version. No card, no trial clock.
Make it yours
Your drill, your dials.
Every mode ships with real dials: clefs, note pools, ranges, display, ledger lines, exam length. Harder settings multiply your exam score, so the grind is always opt-in. Try it:
score multiplier×1.00honest
These are the app's actual numbers, straight from its scoring engine.
and that's one mode · chords add qualities + inversions · arpeggios add octaves + patterns · exams run 1, 3 or 5 minutes
The trailer
Lights down.
MIDISLAYER
the trailer
premieres at launch
60–90s · sound on
not yet · and that's the point
The trailer premieres with the launch. The list sees it first, with the discount attached.
See it first still 01 · landing soon
still 02 · landing soon
still 03 · landing soon
stills from the app · the reel grows at launch
The receipts
Your playing, measured.
Every attempt is recorded, per note: what you miss, where you hesitate, when you show up. Practice stops being a black box.
analytics page · screenshot landing soon
Strongest
Graded Reading
Musician · 7,432 pts
Focus on
F♯4
38% miss rate · dealt back
Momentum
10-day streak
best yet · keep it lit
the app computes these for you, live · example values shown
also in the box
- Consistency calendar— a GitHub-style year of your practice
- Note weakness map— your shaky notes, drawn on a piano
- Slowest notes— where you hesitate
- First-try accuracy— the trend that actually matters
- Exam score & rank— per mode, over time
100% local
No accounts. No cloud.
No telemetry.
Everything lives in a local database on your machine. Your weak notes are your business.
It evolves
v1 is the start, not the deal.
Getting from zero to here took seven modes, three games, the analytics suite and an auto-updater. That pace doesn't stop at launch, and updates within v1 are free.
- next up
Rhythm Training
Tap in time. Pitch already obeys you; now the clock will too.
- planned
Key Signatures
Flash a signature, name it or play the scale. Instant recall.
- planned
Ear Training
Hear it, play it back. Notes, intervals, chords.
- planned
Sight-reading + Metronome
Pitch and rhythm together, against the click.
- the big one
MusicXML scores
Bring your own sheet music. Play through anything, judged note by note.
The order is partly yours to call.
We read everything, and the roadmap bends toward what players actually ask for. Buy early, get loud, watch the app grow around you.
The deal
Own it. No subscription.
Practice apps love subscriptions: a tenner a month, forever, for drills that don't change. We think a practice tool is more like a metronome than a streaming service. You buy it once. It's yours.
It pays for itself against any subscription within months. Updates inside v1 are free. And if life pulls you away from the piano for a year, your tool is still here when you come back. Your cancelled plan would not be.
Free
£0
forever · no card, no clock
- ♪Note Flashcards, the full mode
- ♪Blitz arcade game
- ♪The Daily Challenge
MidiSlayer
£39.99
one-time · yours forever
£29.99 for the launch list
- ♪Every mode, every game
- ♪Exam mode + per-skill ranks
- ♪Full analytics & achievements
- ♪Free updates within v1
- ♪macOS + Windows · direct or Steam
Studio
Per seat
teachers & schools
- ♪Multi-seat licensing
- ♪Built for exam prep
- ♪One invoice, no faff
regional pricing handled at checkout · standard refund policy via our merchant of record
Your first note is 90 seconds away.
MidiSlayer launches in 2026. Join the list for the free version, the launch discount, and exactly one email when it's ready.
One email at launch. No spam, ever.
Questions
Asked and answered.
For the full experience, yes. Any USB or Bluetooth MIDI keyboard works, from a £20 controller to a digital grand. No keyboard handy? The built-in on-screen keyboard covers every mode.
macOS (Apple Silicon and Intel) and Windows 10/11. The app is a fast native desktop app, not a website in disguise.
Really. £39.99 once, yours forever, including free updates within the major version. The launch list gets it for less. We sell a tool you own, not a treadmill you rent.
Note Flashcards in full, the Blitz arcade game and the Daily Challenge. Forever, with no card and no trial clock. The free version is the product, just smaller.
Completely. Activate your license once and everything works without internet, forever: training, games, progress, all of it.
On your device, in a local database. No accounts, no cloud, no telemetry. Your weak notes are between you and your piano.
Purchases are handled by our merchant of record with a standard refund policy, and the free version exists so you can be sure before you buy.
Something else? Ask us directly — a human reads it.