Sketchware Pro comes in two variants, minApi21 and minApi26.
minApi21 is for devices running Android 5.0 Lollipop and above.
minApi26 is for devices running Android 8.0 Oreo and above. It contains more features like Kotlin and Java 11 support, D8, R8, etc.
Material You builds can be found here.
Note: Material You builds are separate from the stable and nightly builds. You can download them here.
The stable builds are the official releases of Sketchware Pro. They are properly tested and are stable for daily use. They are usually the most recommended builds for most users.
The nightly builds are based on the latest changes in the codebase. They are not properly tested and may contain bugs. They contain the latest features and improvements. They are recommended for users who want to test the latest features and are willing to report bugs.