Saline: Saltwater Pool Calc
Salt Water Chemistry & Dosing
About
This app helps saltwater pool owners maintain optimal water chemistry. Input your test readings and pool volume to receive precise chemical dosing recommendations, tailored to your specific salt chlorine generator cell. It also calculates important water balance metrics like CSI and borates.
What's New in Saline
1.2
July 16, 2026
The number keyboard now has a Done button, so you can dismiss it when you're finished. Thanks to everyone who wrote in about this.
In-App Purchases
$2.99
Saline Pro (lifetime)
Full cell + chemistry brand library.
Developer apps
FAQ
Does Saline have ads?
No, Saline is ad-free. The app explicitly states 'no ads' and its monetization model is a one-time purchase for Pro, with no subscription or ads.
How much does Saline cost?
Saline is free to download and includes a 2-day full-feature trial. Unlocking Saline Pro permanently costs $6.99 as a one-time purchase.
What pool salt chlorine generator cells does Saline support?
Saline supports specific cells from Hayward TurboCell, Pentair IntelliChlor, and Jandy TruClear. It tunes salt targets and recommendations to these brands.
Can I use Saline without an internet connection?
Yes, Saline works offline. The app emphasizes its offline functionality and that no account or cloud services are required.
What is the CSI calculation in Saline used for?
The CSI (Calcium Saturation Index) calculation in Saline predicts the longevity of your saltwater chlorine generator (SWG) cell. Maintaining proper CSI helps prevent scaling and corrosion.
What makes Saline's FC/CYA guidance different?
Saline provides SWG-specific Free Chlorine (FC) to Cyanuric Acid (CYA) guidance at a 5% ratio. This differs from the 7.5% ratio typically used for manual chlorine dosing.
What devices is Saline available on?
Saline is a universal app for both iPhone and iPad, indicated by its compatibility with these devices.
How often is Saline updated?
The latest version of Saline was released on June 23, 2026, indicating recent development activity. The app was initially released on June 12, 2026.