Pool Otter: Test, Balance, Log

Know exactly what to add. Type a reading, or tap + for each drop, and Pool Otter turns your water test into the exact amount of each chemical for your pool and your products. For backyard pools, spas and pros with a whole route, from $7.99 a year.

EASY INPUT
Log a test one reading at a time, with your target right there. The dose appears the moment you type a number. Using a drop kit? Tap + for each drop and Pool Otter does the ppm. Pick your test kit, or scan the barcode on the bottle, and you only see the readings your kit measures.

EXACT DOSES
Liquid chlorine, cal-hypo, dichlor, acid, soda ash, baking soda, calcium chloride, stabilizer or salt, sized to your pool's volume and your product's strength. pH doses account for alkalinity, stabilizer, chlorine and borates. Every dose lands in one list: tap Done as you add each one and it's logged.

FOR HOMEOWNERS
Home tells you what needs fixing in one line each, with today's weather at your pool. Get a reminder when it's time to test. Volume calculator included.

FOR POOL PROS
Unlimited pools and spas on Pro, each with its own size, targets, chemicals, test kit, location and maintenance schedule. Switch pools in a tap, see which ones need attention, and share a report for any period.

YOUR TARGETS, NOT OURS
Start from a preset (chlorine pool with FC linked to CYA, salt pool, CDC/ANSI, spa, or test kit maker ranges) and change any minimum, ideal or maximum. Free chlorine can follow your stabilizer level automatically.

THE WHOLE STORY OF YOUR WATER
History lists tests, chemicals, maintenance and notes by day, with the weather. Trends show every reading over time with your target band shaded.

BRING YOUR HISTORY
Import your test history from other pool apps' CSV exports or any spreadsheet in seconds; duplicates are skipped. Export everything to CSV or a full backup at any time, on any plan.

BACKUP AND SYNC
Optional account: back up and use Pool Otter on more than one device. Works fully offline.

PLANS
Every new user gets 14 days of Pro free, with no purchase or card. After that, choose:
• Basic, $7.99 a year: one pool and one spa, with everything above.
• Pro, $24.99 a year: everything in Basic, plus unlimited pools and spas.
If you don't subscribe, your data stays viewable and exportable; adding new entries needs a plan.

Prices in USD; local prices are shown in the App Store. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the end of the period. Manage or cancel it in your Apple Account settings.

Doses are estimates to help you balance your water. Always follow the directions on the chemical's label, never mix chemicals, and retest before swimming.

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Made in the USA by Bayou Browns LLC. No ads, no tracking.