
Simple Pool: Chemistry & Math
Pool & Spa Chemical Calculator
Free · In‑App Purchases · Designed for iPad
Spring pool season is almost here! Check out the new Spring Opening Guide and make sure your water chemistry is ready before the first swim.
Unlock crystal-clear pool water with Simple Pool - the pool chemistry calculator with no subscription, ever. One purchase, lifetime access.
Simple Pool helps you test, dose, and track your pool water chemistry with precision. Get CYA-aware sanitizer targets, practical dosing recommendations, and powerful tools that make routine pool maintenance faster and easier.
Whether you manage a chlorine pool, saltwater pool, bromine pool, or hot tub and spa, Simple Pool gives you accurate chemical calculations every time. No more overspending at the pool store - just enter your test results and get exactly what your pool needs.
What you can do:
• Log full water tests or Quick Tests in seconds
• Track every chemical you add with the unified Activity History
• Monitor the Langelier Saturation Index (LSI/CSI) to prevent scale and corrosion
• Get dosing recommendations for chlorine, acid, alkalinity, calcium, stabilizer, and more
• Set your exact chlorine concentration and acid strength for precise dosing
• Use Shock Treatment mode (chlorine/saltwater pools) with progress tracking
• Set recurring test reminders and shock retest reminders
• Use the Chemical Effects Calculator to preview chemical changes before dosing
• Track trends and test history over time with interactive charts
• Haptic feedback confirms pool status at a glance
• Support for chlorine, saltwater, and bromine pools
Simple Pool Pro (one-time purchase, no subscription):
• One-time purchase — no subscription, no recurring fees
• Unlimited pools and spas
• Full test and activity history
• 90-day and all-time trend ranges
• iCloud sync across Apple devices
Free includes:
• 1 pool
• Test logging and dosing recommendations
• 7-day and 30-day trends
• 30 days of history
Spend less time managing pool chemicals and more time enjoying your pool. Download Simple Pool and make pool care simple.
Links:
• Privacy Policy: https://sites.google.com/view/simple-pool-privacy-policy/home
• Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Events
This update brings a new way to view your pool tests. You’re now able to snap a photo when you test your water - letting you see how your water clarity has improved over time or just giving you a reference for previous tests.
Also includes stability improvements and under-the-hood refinements.
The developer, Grey Park, LLC, 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:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Grey Park LLC
- Size
- 19.8 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- Languages
English and 6 more
- English, Dutch, French, German, Italian, Portuguese, Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- SimplePool - Lifetime $9.99
- Copyright
- © Grey Park LLC
