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.
FREE TO DOWNLOAD · $5.99 UNLOCKS THE LOG · iOS 17+
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.
- No agenda
- PoolBud sells nothing but PoolBud — no chemical brand behind it, no store runs you don't need.
The part you'll show people
Green to crystal, on the record
Every check-in logs your water's clarity. When it comes back from the swamp, PoolBud hands you the before-and-after — dates, doses, and all. "From green to crystal in 21 days" beats any story you could tell at the fence.
For the hot tub
Ready to soak?
A hot tub isn't a season — it's tonight. PoolBud answers the only question that matters before you get in: chemistry in range, temperature right, go. Bromine spas included, and the dark mode was designed for exactly this hour.
Off the bucket label — raise FC by 1 ppm in 10,000 US gal
| Chemical | Amount |
|---|---|
| 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 doseAll chemicals, current → target, your volume→ Pool volume
Gallons & litres from shape and dimensions→
On the App Store now
Free to download. The calculator and swim-safe check are free forever; the photo log and trends are a $5.99 unlock — once, no subscription. iPhone, iOS 17 or later.
OPEN IN THE APP STORE →