The SlopeStab (for Mac computers) and SlopeStabi (for iPhone’s and iPad’s), app’s that evaluate total factor of safety for slopes in soil and weak rocks (evaluate risk for landslides), was earlier upgraded to handle clays with linearly changing cohesion with depth. The 2025 version (version 1.2) is a major further upgrade with many improvements. The program was changed to better utilize the bigger screens on iPads. Earth quake loads was included. An esthetic change was done to the user interface placing the input fields under the graphics showing the problem. This change minimizes the difference between running on iPads and Macs. A method for exporting contents in the TextWindow as tab separated text was included. Some changes was also done when using iPads and iPhones. The text in TextWindow is now non-editable and will be replaced when running a new problem or detail. The earlier editable text easily grow to limits affecting iPhones and iPads limited memory. It was also very difficult to edit or select the text so if you really need the text in the TextWindow to be editable you have to copy it and past it into a word processor. A delete button was included in the InputWindow. This button ”D” deletes the line in focus. Finally in order to avoid unnecessary confusing situations with everything as zeros (0.0) a default slope (actually the ”Example 1.txt” slope) was hard coded into the software. This slope is what you see first time you open the program. The updated manual version 1.7 can be downloaded from below.

The app’s are restricted to analysing according to simplified Bishop and Swedish (ordinary) method of slices. Geometry wise only circular failure arcs are analysed but both app’s share the same input files so you can easily bring your stability thoughts out in the field. The app’s are available at Apple app store’s.