Downloading slope 6.0.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This free software for Mac OS X was originally designed by POLARIZE. The application lies within Education Tools, more precisely Science.
From the developer:
Slope Calculator is an application that helps you calculate ramp's information accurately. You can use your iPhone to measure the slope of a ramp or of a surface. With any two inputs (Run & Rise, Run & Length, Rise & Length, etc.), the app will calculate the rest. You can print or share the report for ease of work.
You may want to check out more software for Mac, such as Slope Fields, SlopeRiderUB or Snowman Slope, which might be similar to slope.
3D Design
3D Design