Yes. Sourced from official DGCA CPL exam materials and updated to match the 2026 syllabus.

Most prep tools give you answer keys. cplOS gives you step-by-step explanations — the formula, the method, the solving approach. You learn how to solve problems, not just memorize answers.

Each question comes with a step-by-step breakdown — the formula, the method, why each option is right or wrong. For Navigation problems, you also get CX-3 flight computer steps.

Yes. Works on phones, tablets, and computers. Progress syncs across all devices.

Yes. All chapters and questions are free to practice. No credit card required. Subscribe to unlock AI explanations.

All chapters are free to practice. AI explanations start at ₹499/month per subject, with Air Navigation at ₹999/month.