Most applications have long since dropped support for Android 4.0 Ice Cream Sandwich, since the version is now only used on 0.4% of all Android devices (as of February 2018). Skype dropped support for Android 4.0.3-5.1 in June 2017, with the app now requiring 6.0 Marshmallow or higher. Microsoft is now reversing that switch, by re-adding support for those versions.
On the official Skype blog, Microsoft announced that it is releasing "a new optimized version of Skype for our customers on Android devices 4.0.3 to 5." It's not rolling out yet, so I'm unable to test it on my KitKat-powered Galaxy Player, but the company says it is lighter on both disk and memory consumption.Read More
Skype expands compatibility to Android 4.0.3 and above was written by the awesome team at Android Police.