This application lists over 400 laboratory tests, physical exam findings, history findings, and radiological studies for the most frequent diseases encountered in the primary care setting. For each entry, measures of the test’s efficacy found in the medical literature are reported. These metrics include: Sensitivity, Specificity, Positive Predictive Value, Negative Predictive Value, Positive Likelihood Ratio, and Negative Likelihood Ratio.

It also includes a calculator that will translate the Pre-test Probability into a Post-test
Probability in the event of either a positive or negative test result.

The database is categorized both by test and by disease. The tests are further divided into three categories: Laboratory, History/Physical Exam, and Radiology. The Pubmed entry where the data was found is listed with each result, along with a brief description of the paper.

A short explanation of the evidence-based metrics is also available in the Information

What’s New

Version 2.0

This app has been updated by Apple to use the latest Apple signing certificate.

New database update allows our team to keep data up-to-date. We also created a free website version at

App Privacy

The developer, Lohr Designs LLC, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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