Gauge: Water Operator Prep
Wastewater operator exam prep
About
Prepare for wastewater operator certification exams with interactive calculators, practice questions, and worked solutions. Study offline with comprehensive content covering various math and process control topics.
What's New in Gauge
1.0.4
November 8, 2026
Updated privacy disclosures. Updated App Store screenshots. Clarified a dechlorination practice explanation.
Subscriptions & In-App Purchases
$14.99
Full Unlock
Unlocks every question, solution, and timed exam.
Developer apps
FAQ
Does Gauge have ads?
No, Gauge is ad-free. The app description explicitly states 'No account or advertising'.
How much does Gauge cost?
Gauge is free to download and includes 49 interactive calculators and 88 practice questions. A one-time unlock purchase is available for additional features.
What is the learning methodology in Gauge?
Gauge utilizes practice questions with worked solutions, formula selection drills, and spaced repetition to aid learning. It provides study feedback rather than official grading.
Does Gauge track progress?
Yes, the paid unlock offers area-by-area results feedback, allowing users to track their progress in specific study areas.
Is Gauge available offline?
Yes, study content and calculators are bundled on the device, allowing for offline study. Internet connection is only needed for purchases, restores, and external links.
What devices does Gauge support?
Gauge is available for iPhone and iPad, indicated by its supported devices list.
How often is Gauge updated?
The app was last updated on November 8, 2026, indicating recent development and support.
What age rating does Gauge have?
Gauge has an age rating of 4+, making it suitable for a wide range of users.
