





248+ iOS apps curated and reviewed
Out of 248+ water treatment level 4 apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | — | No | Yes | May 2026 | |
| 2 | Free was $7.00 | — | No | Yes | May 2026 | |
| 3 | Free | — | No | Yes | May 2026 | |
| 4 | Free | — | No | Yes | May 2026 | |
| 5 | Free | 3.0★ (10) | No | No | Aug 2026 | |
| 6 | Free | 5.0★ (2) | No | No | May 2026 | |
| 7 | Free | — | No | Yes | May 2026 | |
| 8 | Free | — | No | No | Aug 2026 |






















Manage your Waterdrop brand water purification devices, track filter lifespan, and receive timely replacement reminders. Access customer support and check U.S. water quality reports for safe drinking water.


This utility app streamlines water treatment operations with features for tracking sample sites, recording daily readings, managing inventory, and generating reports. Developed by an experienced operator, it simplifies daily tasks for efficient facility management.




Get high-quality drinking water quickly and conveniently without the hassle of subscriptions or deliveries. Enjoy pure water in just three minutes, available around the clock.


This application offers a suite of water and wastewater treatment calculators to streamline your work. It aims to save you time and improve efficiency, with plans to regularly add new calculation tools based on user feedback.


This app monitors your water filtration system, providing real-time quality data and tracking your consumption. It alerts you to local toxins and violations, ensuring your filtered water is clean, healthy, and alkaline.


Track real-time water levels for over 12,000 rivers and streams nationwide. Get flood alerts, monitor conditions, and plan boating or fishing trips with confidence. Access NOAA data and an interactive map to find gauges easily.






Monitor and control your water treatment system with real-time access to performance parameters, management reports, and inventory levels. This intelligent application helps you collect and react to critical water treatment operations 24/7.




Prepare for your water operator certification exam with a comprehensive study tool. Access thousands of practice questions, detailed explanations, and progress tracking. Master water treatment, distribution, and wastewater topics to advance your career.


This app offers comprehensive training for the water treatment industry. Learn about product specifics, water science, sales strategies, and business management tools. It's designed to support customers of various A. O. Smith Water treatment brands.


Monitor your water quality in real-time with this app, which connects to a WiFi-enabled water purifier. Track water consumption, savings, and environmental impact. Access a database of water contaminants by zip code and reorder filters directly.


Monitor and control your Chandler Systems water treatment system with ease. View system settings, track water usage, and initiate cycles remotely. Connect to multiple valves from a single device and update valve firmware.

