





250+ iOS apps curated and reviewed
The best water treatment level 1 apps on iPhone average 3.7★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free was $7.00 | — | No | Yes | May 2026 | |
| 2 | Free | — | No | Yes | May 2026 | |
| 3 | Free | — | No | Yes | May 2026 | |
| 4 | Free | 4.5★ (620) | Yes | Yes | Aug 2026 | |
| 5 | Free | — | No | Yes | May 2026 | |
| 6 | Free | 5.0★ (2) | No | No | Aug 2026 | |
| 7 | Free | 1.5★ (2) | No | No | May 2026 | |
| 8 | Free | — | No | No | May 2026 |




















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 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.


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.




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 appliance offers a significant advancement in whole-house water purification, meeting bottled water standards. It effectively reduces a wide range of contaminants, softens water without salt, and features a space-saving, quiet, and low-maintenance design with a long warranty.




This app connects to a whole-house water appliance that purifies water to meet bottled water standards. It significantly reduces contaminants like lead, arsenic, and nitrates, while also softening water without salt. The system features a space-saving design and quiet operation.




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.












Easily manage your beverage deliveries and account details. Order bottled water, sparkling water, teas, and more for home or office. Schedule deliveries, make payments, and access exclusive offers.