The Lab Values app allows you to manage your lab results and keep track of changes. It also allows you to look up the most common lab tests. 

The app is a completely free app, but you can purchase a one-time in-app purchase to remove the ads. The ads can be removed permanently if you decide you do not want to see them.

The app can be used to view the most common lab results, such as the white blood cell count, hemoglobin, cholesterol, HbA1c, creatinine, and protein. It can also be used to look up the results of other blood tests.

The app allows you to change the results and add comments. It also allows you to export your data to a CSV file.