See how your ear sharpens — on your device, and only there.
My practice
Your daily-game history and threshold estimates. Everything on this page lives in this browser — no account, no server, nothing leaves your device.
What these numbers are — and what they aren't
This is your practice history in these games — it is not a hearing exam and not a diagnosis. The numbers describe how you did here, and they also depend on how you practice: your headphones or speakers, the noise around you, how tired you are.
Today
This part is free, forever. Finishing the daily Hearfork round adds today's estimate here automatically; a threshold run adds a more precise one.
Threshold run
A short adaptive session in the Hearfork playground: the pitch difference keeps shrinking while you keep getting it right, and grows when you miss — closing in on the smallest difference you can reliably hear. It ends by itself after 8 turning points (usually 20–30 quick picks).
Runs in the playground only — today's daily puzzle, points and streak are untouched. You can leave anytime; the run is saved and resumes where you left off.
Your trend over time
The trend view — every estimate over time, with confidence bands — is part of the Hearkle Personal Pass. Your history is already being saved on this device for free, so nothing is lost before you start.
After checkout, your key arrives by email within 24 hours — paste it in the key section below. Already have a key? It works there too.
Move your data to another device
Export writes everything this site stores in this browser — practice history, streaks, points, presets — into one JSON file you keep.
Export is a Personal Pass feature — the buy links are in the trend section above. (Import below is free, always.)
Import is free — your own data always comes back, key or no key. Pick an export file from this site; it replaces what is stored here after you confirm.
Personal Pass & keys
A key only changes what this page shows — nothing you can do today ever moves behind it, and your practice history keeps growing (and stays yours) with or without one.
Questions or feedback? Write to hello@hearkle.com. Every message gets read.