Steps are capped, not averaged
No rung asks for more than a tenth of the tempo you are leaving, and never more than 10 BPM. A jump from 60 is smaller than a jump from 200, because your hands feel proportion, not arithmetic.
Speeding a passage up by pushing the metronome until it falls apart teaches your hands to fall apart. This builds the ladder instead: the tempo you already own at the bottom, the tempo you want at the top, and a session for every rung between them.
How this works
Two players entering the same target get different ladders, because the shape is derived from the distance between your two tempos and the number of sessions you are willing to spend.
No rung asks for more than a tenth of the tempo you are leaving, and never more than 10 BPM. A jump from 60 is smaller than a jump from 200, because your hands feel proportion, not arithmetic.
Some rungs repeat the previous tempo. Reaching a tempo once and owning it are different things, and the second one only comes from repetition at a speed you already reached.
Every ladder contains at least one back-off rung: drop below the top tempo you reached and climb back through the rungs you already passed. Re-covering ground is what turns a ceiling into a floor.
Rungs land on whole BPM, and on multiples of five or two wherever that does not distort the spacing. A ladder you cannot dial in is not a ladder.
The first session is not practice. You are finding the fastest tempo you can play the passage three times in a row, cleanly. Start the ladder above that and every rung after it is guesswork.
There is no account and no upload. Your two tempos and the sessions you check off are stored in this browser only, and the clear button removes them.
Why the rungs are shaped this way, and what to run when one of them will not pass:
Choose one finish line and turn it into a four-week practice sequence you can run this month.
Answer a short set of questions and name the part of your practice that stopped producing change.
Turn the minutes you actually have into timed blocks, weighted toward the one thing you are fixing.
Check a song against the parts that break under pressure before you call it finished.
Log one line per session and read what actually moved, with no streak counter and no direction under three sessions.
What to do with a practice hour so it changes your playing instead of filling the time.
Why progress stalls once the beginner gains run out, and what to change when it does.
What deliberate practice means at the instrument, and how it differs from playing something again.
The builder can tell you the next tempo. It cannot tell you that your left hand is late because your right hand is early. The founding room is being assembled for that part: a small crew, a weekly recording, and one correction that changes the next session.
Applying starts a fit conversation. It does not charge you or create a commitment.