# PoolSure: Pool Calculator — Pool & hot tub dosing, offline

> Pool & hot tub dosing, offline (iPhone/iPad app by Mustafa ismail Toptas.)

- Source: https://appshunter.io/ios/app/poolsure-pool-calculator/id6828831171 (this page in markdown: same URL + `.md`)
- Developer: [Mustafa ismail Toptas](https://appshunter.io/developer/1860554348)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.4 · 48 MB
- Languages: American English, French (France), German (Germany), Italian, Brazilian Portuguese, Mexican Spanish
- Released: 2026-11-05
- Data updated: 2026-11-07

## What is PoolSure?

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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| PoolSure Pro | $9.99 | one-time |


## Is PoolSure safe?

Not enough ratings yet to assess PoolSure.

## Is PoolSure legit?

PoolSure: Pool Calculator has limited verification signals. The AppsHunter Legitimacy Score for PoolSure is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-11-05

No release notes.

## More apps by Mustafa ismail Toptas

- [Questify: Habit Tracker RPG](https://appshunter.io/ios/app/questify-habit-tracker-rpg/id6763556446)
- [Skincare Scanner: Ingredients](https://appshunter.io/ios/app/skincare-scanner-ingredients/id6828539758)

All apps by Mustafa ismail Toptas: https://appshunter.io/developer/1860554348

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-07.*