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Free study tools for water and wastewater operators.

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Operator Master is independent and is not affiliated with WPI, PSI, ABC, the Washington State Department of Ecology or any other state or provincial certification agency.

Operator Master Premium

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Free vs Premium vs Course Pass

FreePremiumCourse Pass
  • Practice questions, every level and track✓Free: included✓Premium: included✓Course Pass: included
  • Flash cards✓Free: included✓Premium: included✓Course Pass: included
  • Math Center and formula sheets✓Free: included✓Premium: included✓Course Pass: included
  • cram session session–Free: not included✓Premium: included✓Course Pass: included
  • Ask Klok (AI agent) to explain a questionFree: 1 a dayPremium: 20 a dayCourse Pass: 20 a day
  • Test-date plan with a daily goal–Free: not included✓Premium: included✓Course Pass: included
  • Full timed practice exams (100 questions)–Free: not included✓Premium: included✓Course Pass: included
  • Ready check after each full exam–Free: not included✓Premium: included✓Course Pass: included
  • Read every course with no timer (no credit)–Free: not included✓Premium: included✓Course Pass: included
  • Every course for credit, with its certificateFree: $20 a coursePremium: $20 a course✓Course Pass: included

The Course Pass is every course and its certificate plus Premium: $150 for 1 year (365 days). Utility team seats include Premium too.

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