PoolBud: Pool & Hot Tub Care

Exact doses for your exact water. Test, dose, log — watch it go from green to crystal, and know at a glance when it's ready to swim or soak.

Type in your test readings. PoolBud tells you exactly how much of what to add — for your water volume, your chemicals, your units.

The calculator and swim check are free forever. The logbook — unlimited check-ins, photos, trends and the Water Report — is $5.99 once. Not a subscription. No account.

From green to crystal, on the record.

WHY POOL OWNERS SWITCH • Exact doses in grams, ounces or millilitres — for the chlorine you actually buy (liquid, cal-hypo, dichlor, trichlor, or bromine for spas) • Every dose shows its work — standard published chemistry, no store runs you don't need • Swim-range check on free chlorine, always visible, always free • pH doses carry honest bounds: add ⅔, re-test, top up — how the pros avoid overshooting

THE LOGBOOK • Photo check-ins: watch your water go from green to crystal • Trends for chlorine and pH against their target bands • Season chapters — your pool year, kept • The Water Report: a before/after card worth showing someone • A weekly test reminder (one nudge, no other notifications ever)

HOT TUBS TOO • "Ready to soak?" — chemistry and temperature in one answer • Bromine dosing, spa target ranges, and a dark mode designed for evening soaks

PRIVATE BY DESIGN No account, no analytics, no ads. Your data lives on your phone and syncs through your own private iCloud — never on our servers, because we don't have any. Deleting really deletes.

Litres and gallons are both first-class. In-ground, above-ground, and inflatable pools all welcome.

PoolBud is a water-care tracking tool, not professional advice. Dose results are estimates — always follow chemical label instructions.