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Listen, then play it back

Press Listen, then repeat the melody on the keyboard. Seven notes.

Listen first, then start the challenge.

Play a sequence of 7 notes

Unlock to reveal the reward

Music teachers

Play the melody back, and the lock opens

A short melody, three listens, and a piano on the screen. Your pupil repeats what they heard and unlocks the exercise, the score, the discount or the surprise behind it. Ear training that does not feel like ear training, on any phone, with nothing for them to install.

How it works

1

Pick a melody

Thirty short ones come with it, from three notes to two octaves, beginner to advanced, with and without accidentals. All of them public domain or written for this.

2

Set how many listens

Three is the usual number. Unlimited is a lesson; one is a test. The keyboard shows the notes in letters or in Do Ré Mi, whichever your class uses.

3

Hide something worth playing for

Next week's exercise, a score, a backing track, a discount on the next term, or a video of you playing it properly.

Designed down to the last detail

Every pixel of the lock is yours to style.

Nothing on the screen is fixed. Pick from dozens of looks, choose the object that opens or upload your own pictures, set the typeface and size, and end on your own reveal. Your players see exactly the screen you designed.

Look

49 looks, solid colours and gradients. Each one repaints the whole page behind the lock.

Object

31 drawn objects, shut while the lock holds, open once it gives way.

Typeface and size

10 typefaces and 6 text sizes, from a phone in hand to a screen across the room.

Or your own two pictures

Upload a closed and an open picture: the parcel as wrapped, then what was inside. Included with the Event Pass and Pro.

7 looks and 13 drawn objects are free. The premium looks, the other objects, your own pictures, the animations, typefaces and text sizes come with the Event Pass or Pro.

Build yours
49
looks
31
objects that open
10
typefaces
8
unlock animations
12
lock types
5
player languages

A complete example: the weekly ear training

The lock in the demo above, as a piano teacher actually sets it.

The melody
Mary had a little lamb: seven notes, no accidentals, one octave. The first one anybody can do.
Listens allowed
Three. Enough to hear it, not enough to memorise the button presses.
Notation
Letters for an English-speaking class, Do Ré Mi for a French one. The keys are labelled either way.
What counts
The notes, in order, on one octave. The rhythm is not marked, because 'repeat these notes' is the exercise.
Octave
Playing it an octave down still counts. A phone keyboard is small, and the interval is the thing being taught.
A clock
Sixty seconds, on Pro. It stops the guessing: there is not time to try every key.
The reveal
The exercise for next week, as text, or a link to the score.

Six ways teachers use it

The weekly ear test

One melody a week, three listens, the next exercise behind it.

The trial lesson hook

A melody on your website. Crack it and the discount on a first lesson appears.

Note recognition

A single note, named on the keyboard. The very first exercise.

The interval drill

Two notes. They have to hear the distance rather than the tune.

The black key lesson

A melody with one accidental in it, and nowhere to hide from it.

The end-of-term challenge

Two octaves, no labels on the keys, sixty seconds.

Simple, honest pricing

Free, with the full melody library and unlimited pupils. Pro adds the countdown, which is what stops a pupil pressing every key until something works, and one play per device, which is what makes a result mean something.

Free

$0forever

Build a real lock, single or multi-step, and let people play it. No time limit.

See what is included
  • 3 locks
  • 1 multi-step lock of up to 3 steps
  • Text, link, image, button and promo code reveals
  • Basic statistics
  • Lock Challenge branding on the player page
  • Personal and educational use
Create a free lock

Event Pass

$9.90once

One event, dressed properly. Every look, animation and typeface, and your experience live for 30 days. It closes when the pass ends and reopens the moment you pay again. Running sessions, the results and the timer stay with Pro.

See what is included
  • Everything in Free, for one event
  • No Lock Challenge branding
  • Your own accent colour on multi-step locks
  • 42 premium looks and 18 more drawn objects
  • Your own before/after pictures
  • 8 unlock animations to choose from
  • 22 dressed scenarios, ready to run
  • Audio, video and file reveals
  • Sudoku locks, generated in three difficulties
  • Wordle locks, with coloured guesses
  • Text size and font
  • Email invitations, up to 200 at once, tracked person by person
  • 10 locks and an 8-step trail
  • One payment. Your event runs for 30 days.
Get the Event Pass
Best value

Pro

$14.90per month

See what is included
  • Everything in the Event Pass, all year
  • Unlimited locks, multi-step locks and steps
  • Printable QR pack
  • Live dashboard and leaderboard
  • Scheduling
  • Detailed results and CSV export
  • Player emails, collected at the reveal and exported
  • Timed challenges: a clock the server keeps, per game and per step, one play per device
  • A cap on how many people win, with a sold-out message
  • Access code, player and attempt caps, single use
  • An event date, with a reminder the day before and a report the morning after
  • Choose whether players can look back at the steps they solved
  • Your logo on the lock
  • Duplicate a whole multi-step lock in one click
  • Bulk step creation
  • Iframe embedding
  • A "challenge a friend" button under your reveal
  • Commercial use
  • Cancel any time
Get Pro

Every plan: 12 free lock formats, unlimited players and attempts, 7 looks and 13 before/after picture pairs, QR code and short link.

Music teacher questions

What is a melody challenge?

A lock whose answer is a tune. The player presses Listen, hears a short melody, and repeats it on a piano keyboard on the screen. Get the notes right and whatever you hid behind it appears.

Which melodies can I use?

Thirty come with it, across three levels, with and without sharps and flats, at several tempos and across two octaves. Every one is either traditional and long out of copyright or written for this product, so a school can put one on its website without wondering.

Does the rhythm have to be right?

No. The order of the notes is what counts, because 'repeat these notes' is the exercise most pupils are set. You choose how many times they may listen first.

Letters or Do Ré Mi?

Either. The keys are labelled in whichever your class uses, and sharps and flats are the same key: a pupil who reads F sharp and a pupil who reads G flat press the same thing, because on a piano they are the same thing.

Can I stop them guessing?

Add a sixty second limit, on Pro. There is not time to try every key, so the answer has to come from having heard it. Pro also allows one play per device, which is what makes a result defensible.

Does it need a real piano or an app?

Neither. The keyboard is on the screen and the sound is made by the browser, so it works on a phone in a waiting room. Nothing to install and nothing for the pupil to sign up for.

Ear training they will actually do

Pick a melody, set three listens, and hide next week's exercise behind it. Free, and it takes about four minutes.

Build your melody challenge