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

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

Ratings and Reviews

3.7 out of 5
3 Ratings

3 Ratings

AWD32 ,


Downloaded the app a little over a week ago, and have already used it more than a dozen times on the wards. Useful for checking how much confidence to place in a positive/negative test.

maalbrecht ,

Waste of money

I am a primary care internist. First of all, this app is not good for primary care. Second of all, there is no explanation on how this app is to be used. Finally, the items to search for are not comprehensive. Most of the diseases or history items that I search for are not available on this app. I typed in anemia, cough, back pain, and several other common symptoms and diseases and nothing came up. The developers need to go back to the drawing board.

blo17 ,

All Good

We've updated and fixed a minor bug. This app is absolutely ready to start saving primary care physicians time and money. Simple, clean and easy to use. Enjoy!


Lohr Designs LLC
19.8 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© Brett Lohr


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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