Pool FC Journal

Keep your pool or spa readings together. Log free chlorine, review your history and save a backup, even offline. A clear place for the water tests you already take. Create one pool or spa profile, enter the free-chlorine (FC) reading from your test kit and return to your saved measurements. Your profile, your units Keep the water volume with your profile. Switch between metric and US display units without changing stored values. A history you can revisit Browse timestamped readings and see a simple trend when enough measurements are available. Archive older entries and restore them to the journal when needed. A copy you control Export a JSON copy of your saved journal data to a location you choose. Preview an import before confirming it, or cancel without changing your journal. Records stay on your device; no account is needed. This is a measurement journal. It does not calculate targets or chemical doses, recommend treatment, diagnose problems or judge whether water is safe.