KeyFu
Join the beta

Piano practice for iPhone and iPad

Practice with purpose.Play with freedom.

A coach that plans what you practice next: technique, chords that make sense, and playing freely without notes to follow.

The KeyFu dashboard: today’s key, a line from the coach on why today leans on chord moves, then Today’s practice, Talk to your coach, Your skills, Exercise library, Train your ear and Play freely

You need an iPhone or iPad and a keyboard that connects by USB or Bluetooth MIDI, from 25 keys up. Most current digital pianos do.

We send one confirmation email, then invitations in small waves. The beta is for adults (18+).

Without the tick we use your address only for the beta and the launch, including your code for a discounted first year. You can unsubscribe at any time.

This list is run by KeyFu (Martin Neuschulz), Kurt-Eisner-Straße 58, 04275 Leipzig, Germany, hi@keyfu.app (privacy).

You can hear it. Your hands can't play it yet.

The same movement, over and over, until it's yours: a chord shape, the next change, a steady left hand.

KeyFu plans the repetitions, then gets out of the way.

Your coach KeyFu

I don’t use sheet music. We’ll start from where you are.

Whenever I change something, I’ll tell you why.

Which one sounds like you?

Practice that fits you

KeyFu is a piano practice app for iPhone and iPad, for people who play without sheet music. It connects to your digital piano or MIDI keyboard and plans around you.

The minutes you have

Short bursts are fine: Change time plans the session again for the new length. Or play freely, with no clock at all.

Your goal, in your words

Pick a ready-made goal like Just sit down and play, add your own words like “play while I sing”, or both. Setting goals stays free forever.

The keyboard you own

From 25 to 88 keys: the exercises KeyFu picks fit your keyboard, and it can follow your octave buttons.

How your hands are today

If the next exercise looks like too much, Let’s ease off says why and leaves the choice to you.

The key you play in

The coach’s pick, or any home note in any kind of key.

How KeyFu adapts to you

Inside KeyFu

Practice with purpose

Chords as numbered steps

In C major, C, G, Am and F are 1, 5, 6m and 4 (m for minor). The numbers make the same move in every key, and the names change with it.

The seven chords of C major by number: 1 C, 2 Dm, 3 Em, 4 F, 5 G, 6 Am, 7 B diminished
All seven chords of C major, each with its number
Piano chords without reading music

The roll waits for you

Blocks move toward a line, with the keys outlined below, and the roll waits until your chord is down. It’s there while a shape is new; one tap hides it.

When the roll has stopped earning its keep, the coach may offer to leave it off. You’re always asked first.

1–5–6m–4 in E♭ major. Blue, left hand: the note each chord is named after, on the beat. Gold, right hand: the chord.
Today’s practice, start to finish

Play with freedom

Play freely, nothing to get wrong

No plan, no clock. The app holds the harmony under you, and each run has one goal, picked from how your earlier runs went.

Play freely: a card reads The app holds this: 1 · C in C major; the goal Stay in the key; and two octaves of keys numbered 1 to 7, the 1 striped and the chord’s notes outlined in gold
The app holds a low C, the key’s 1; you wander above it
How playing freely works

The coach says why

KeyFu, your coach, says why when he changes the plan. After an exercise, Ask KeyFu opens a chat about how it went.

After an exercise

The Done card after an exercise: KeyFu says it held and you played it out to the end, good place to stop, same set next time; Timing and Chord shapes are marked as up

How it went, where next time starts, which skills grew.

Your skills

Your coach KeyFu

Timing is leading. Ear is your next win — worth a session. Your goal leans on Chord moves, Chord shapes, and Low notes — and that's where most of this week went.

Your skills: the skill wheel above its table. Six skills with level, freshness and this week’s minutes: Timing, second nature, 12 min; Chord moves, strong, a goal skill; Ear, solid; Chord shapes, strong, a goal skill, 36 min; Hand sync, strong; Low notes, strong, a goal skill

Each slice is one skill and fills as it grows. Freshness shows how well each is holding, with the days since you played it; a week away resets nothing.

Meet your coach

Everything in the app

The six places on your dashboard. The library and its ready-made routines are free for everyone.

Pricing

KeyFu is free during the beta. Fair pricing at launch — core practice stays free.

Free for everyone: the exercise library and its ready-made routines, any exercise you pick, and one session a week planned for you. Setting your own goals stays free forever.

KeyFu Pro plans the right session every time you sit down and lets you build your own routines. Everyone on the beta list gets a discounted first year.

How the discounted first year works

Join the beta

Each conversation with your coach costs real money to run, so invitations go out in small waves.

No lessons or sheet music needed. Songwriters, people coming from another instrument and anyone who already plays a bit and wants to play freely are especially welcome.

We send one confirmation email, then invitations in small waves. The beta is for adults (18+).

Without the tick we use your address only for the beta and the launch, including your code for a discounted first year. You can unsubscribe at any time.

This list is run by KeyFu (Martin Neuschulz), Kurt-Eisner-Straße 58, 04275 Leipzig, Germany, hi@keyfu.app (privacy).

You need an iPhone or iPad and a keyboard that connects by USB or Bluetooth MIDI — most current digital pianos do.

Runs on iOS 18 or iPadOS 18 and later.