About EP Calipers

EP Calipers is an app that allows you to use electronic calipers to make measurements on images of ECGs or EP recordings. See this post for more details.

EP Calipers is available for iPhone or iPad, Android devices, Mac, and Microsoft Windows™. Click on the links in the previous sentence to go to the download pages of each version, except for the Microsoft version, for which see the next section.

Notes on EP Calipers for Windows

There are two versions of EP Calipers for Windows. Both versions have exactly the same features. Both versions require an up-to-date version of Windows 10. The first version is a self-contained zip file and is available for download from FastSpring here. It runs as a normal Windows program. Unzip the downloaded file and double-click on setup.exe to install the program.

The second version is available from the Microsoft App Store here.

Once again, both versions are identical in function. Which version you should download depends on whether you want to have a self-contained version of the program or want to use the Microsoft App Store. In addition, the FastSpring version is compatible with both 32-bit and 64-bit systems, while the Microsoft App Store requires a 64-bit system. One other consideration: the FastSpring version is $4.99, and the Microsoft App Store version is less expensive at $3.99.

It is possible to run the FastSpring version on earlier versions of Windows (back to Vista SP2!); however, it is necessary to download the Windows Universal CRT update. Please read the instructions of the linked page carefully to set up your system.

Note on PDF files in the Microsoft Windows Version

In order to view PDF files with the Microsoft Windows version of EP Calipers, it is necessary to download and install Ghostscript on your computer. Ghostscript is a free, open-source PDF handling library. It is available from this site. Download the Windows version (32-bit or 64-bit) that is appropriate for your computer. You can right-click on This PC in a File Explorer window and then click properties to see what kind of system (32-bit or 64-bit) you are running. You can install the download from the GNU Affero General Public License column, which is the free version. This version can be used because EP Calipers is itself open-source software covered by the GNU GPL v3.

This is only required with Windows. All other platforms support PDF files natively. If you choose not to install Ghostscript, the program will still work with the exception that it cannot open PDF files. However, using the transparent window mode of the program, you can make measurements on any image or document open on your Windows desktop. So if you have the ability to open PDF files in an external program (say, a web browser), you will be able to make measurements.