PoolBudWater chemistry · iOS
$5.99 ONCE

Your pool.
Your numbers.

Type your test readings in, get grams and ounces out — for your exact water volume and your exact chemicals. No account. No subscription. Works at the poolside with no signal.

Test & dosefree · works right here
To reach 4.0 ppm, add
30.3 fl oz
of liquid chlorine (12.5%) to 10,000 gal
OFFLINE ✓NO ACCOUNT ✓METRIC + US ✓HOT TUBS ✓

What the app adds

Every chemical
Chlorine, pH up/down, alkalinity, calcium, stabilizer, salt, bromine for spas — with safety notes on the acids.
Photo log
Every test saved with a photo. Watch green turn clear, then share the before/after.
Trends
FC and pH over time against their target bands, so drift shows before trouble does.
Your pools
In-ground, above-ground and Intex, hot tubs. Litres and gallons are both first-class — Australia, you're covered.
Private
Everything stays on your phone. A calculator has no business asking for your email.

Off the bucket label — raise FC by 1 ppm in 10,000 US gal

ChemicalAmount
Liquid chlorine 12.5%10 fl oz
Cal-hypo 67%2.0 oz
Dichlor 55%2.4 oz
Trichlor 90%1.5 oz

Free calculators

Chlorine dose
All chemicals, current → target, your volume→ Pool volume
Gallons & litres from shape and dimensions→

Ships this October

One email on launch day. No list, no newsletter.

NOTIFY ME →
PoolBud is a water-care tracking tool, not professional advice. Doses are estimates — follow chemical label instructions, and always add acid to water, never water to acid.