It was replaced by PumaTracker. This page exists for one reason: to get your data off this domain before it goes away for good.
Checking this browser for saved PumaKeeper data…
PumaKeeper stored everything in your browser's local storage, scoped to this exact address —
pumakeeper.greykit.com. No server ever had a copy. Only a page served from this
domain can read it, so once this domain stops resolving, the data is gone permanently.
Nothing can recover it afterwards.
.json file you just downloaded.PumaTracker still reads the legacy PumaKeeper backup format, so the file imports as-is — no conversion needed.
It remains available at app.html for the rest of the grace period, so nothing you were mid-way through is stranded. It will go away when this domain does.