Poolstead: Pool Calculator
Pool calculator and water log for iPhone

Calculate clearly. Record what you actually add.

Poolstead is being built for pool owners who already test their water and read product labels. Estimate selected increases from explicit volume and strength assumptions, then keep water tests and actual treatments in one private history. Your records stay on your device and can synchronise through your private iCloud when available.

Coming soon on the App Store

Poolstead artwork with a calm blue pool surface and measuring marks
Calculate available chlorine, salt, cyanuric acid, total alkalinity with sodium bicarbonate, and calcium hardness with calcium chloride.
Save only the readings you have, then record actual treatments separately from estimates and correct the history later.
One pool, calculations, water history, CSV export, private iCloud when available, and support are free. A one-time Plus upgrade adds pools and local PDF reports.