Due to inaccessibility and unaffordability, many small hospitals in India lack Patient CO2 monitoring devices. Many patients are being treated without it. It is a critical care device. It can easily find abnormal conditions such as apnea, hypoventilation, hyperventilation, etc. We want to make and install accessible and affordable patient CO2 monitoring devices on each ICU bed and Operation theatre. As a result, we are developing a mobile app-based patient CO2 monitoring device for them that is 50% less expensive, compact, simple to use, and accessible to all medical professionals. Making it accessible to everyone, it will save many lives and the cost of patient reports after surgery.