PoolSure: Pool Calculator

Pool & hot tub dosing, offline

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Enter your test results and get the exact amount of your own product to add — in a safe order, with safety rules built in. No account, no ads. PoolSure turns your pool or hot tub test results into a clear, step-by-step plan: what to add, how much of your own product, and in which order. DOSES FOR THE BOTTLE YOU ACTUALLY HAVE Pick your product and confirm the strength printed on its label — 10% or 12.5% liquid chlorine, 150 g/L, cal-hypo, trichlor, dry acid, pH minus and more. Doses are calculated from chemistry, not guessed from a generic table, and always rounded down to the safe side. SAFETY BUILT IN • Acid and chlorine are never in the same step — the plan makes you circulate in between • Big corrections are split into parts with a retest in between • Warnings when two of your products must never be mixed • Clear “safe to swim” status after shocking • Doses that rely on a model are marked “Estimate” POOLS AND HOT TUBS Chlorine, salt systems, bromine and active oxygen. Any size, from a small hot tub to a large pool. A volume calculator helps if you're not sure. A LOG THAT KNOWS YOUR WATER Every test and every dose is saved on your device. PoolSure tracks how stabilized chlorine slowly builds up stabilizer (CYA) and calcium between tests. YOUR COUNTRY, YOUR UNITS Product presets and target ranges for the US, Canada, the UK, Australia, France, Germany, Italy, Spain, Mexico and Brazil. Metric or US units. English, French, Spanish, Portuguese, German and Italian. PRIVATE BY DESIGN No account. No server. No ads. No tracking. Works offline. Backups are a single file you keep. FREE, WITH AN OPTIONAL ONE-TIME PRO Testing, dosing, the full log and backups are free forever. Pro (one payment, no subscription) adds several pools and hot tubs and trend charts. Doses are calculations, not professional advice. Always follow the product label. Pro is a one-time, non-consumable purchase — no subscription, no renewal. Restore it any time from Settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://mustafatoptss.github.io/poolsure-site/privacy.html

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, Mustafa ismail Toptas, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Purchases

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Mustafa ismail Toptas
Size
49.9 MB
Category
Utilities
Compatibility
Requires iOS 16.4 or later.
  • iPhone
    Requires iOS 16.4 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English and 5 more
  • English, French, German, Italian, Portuguese, Spanish
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Mustafa İsmail Toptaş
  • Developer Website
  • Privacy Policy

    • More by Mustafa ismail Toptas