Health Monitor 4.0 is a free Android application developed by OSO2 Pty Ltd. The app serves as a smart blood pressure and SPO2 monitoring tool that helps in the early detection of stroke and heart attack. It is categorized under Lifestyle with a subcategory of Health and Fitness.

The app is designed to manage the measurements of every patient and provide a summary and prognosis right after each measurement. Additionally, the app allows users to share the result with their GP and family members. With Health Monitor 4.0, users can take control of their health and manage their blood pressure and SPO2 levels with ease.