When comparing MediBang Paint Pro vs sK1, the Slant community recommends sK1 for most people. In the question“What is the best open-source drawing software for Android?” sK1 is ranked 7th while MediBang Paint Pro is ranked 9th. The most important reason people chose sK1 is:
sK1 tries to look and feel like Corel Draw, it has also an excellent *.cdr importer.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Multi-platform support
Windows, macOS, iOS and Android.
Pro Has a lot of options for editing photos
Pro Free
It's a powerful, fully featured app and it's free.
Pro Corel Draw compatible
sK1 tries to look and feel like Corel Draw, it has also an excellent *.cdr importer.
Pro Cross-platform
Its written in the cross-platform WxWidgets toolkit.
Pro Open-Source
Released under the GNU Lesser General Public License.
Pro CMYK colorspace support
CMYK support is one of its main features.
Pro Under GNU LGPL
So you don't have to fear the harsh copyleft of the GNU GPL license.
Cons
Con Displays a dialog with some ads at the start
When starting up the app, there is a dialog that pops up containing advertisements, this can simply be closed, but will happen every time when opening the app. Sadly there is no way to remove these ads currently.