Continuous Positive Airway Pressure (CPAP) and BiLevel Positive Airway Pressure (BiPAP) are critical respiratory support devices frequently used in clinical settings to manage patients with breathing disorders such as obstructive sleep apnea (OSA) and complex respiratory conditions. CPAP delivers air pressure at a single, constant level that remains consistent during both inhalation and exhalation. This continuous pressure helps keep the airways open, making it the preferred choice for many patients with OSA. Typically, CPAP machines are less expensive and easier to use than BiPAP devices. Conversely, BiPAP offers two different pressure levels: a higher pressure during inhalation and a lower pressure during exhalation. This dual-level pressure setting can accommodate the natural breathing cycle more comfortably, especially for patients with more complex breathing problems such as central sleep apnea (CSA), heart failure, chronic obstructive pulmonary disease (COPD), Parkinson's disease, and ALS. The ability to adjust pressure during exhalation reduces the work of breathing, improving tolerance and oxygenation. Understanding these key differences is essential for nurses preparing for the NCLEX and working in clinical environments. Precise knowledge about when to use CPAP versus BiPAP, recognizing their indications, and managing patient comfort and adherence can significantly impact patient outcomes. Nurses should also be aware that while CPAP is generally recommended for OSA, BiPAP is reserved for patients requiring additional airway support and those with neurological or cardiopulmonary conditions. In nursing education, cheat sheets highlighting distinctions like constant versus bi-level pressures, typical clinical uses, and pathologies addressed by each device serve as invaluable study tools. Supplementing theoretical knowledge with practical insights from such resources enhances critical thinking and decision-making abilities. For those preparing for exams like the Next Gen NCLEX, incorporating these focused comparisons into study routines increases confidence and mastery over respiratory therapy topics. Overall, this overview of CPAP and BiPAP equips nursing students and professionals with a robust understanding of respiratory modalities, ensuring quality patient care and exam preparedness. Accessing comprehensive study materials such as nursing cheat sheets and practical guides remains a recommended strategy for NCLEX success and future nursing practice.