When comparing Seesaw vs Fyne, the Slant community recommends Fyne for most people. In the question“What are the best cross-platform GUI toolkits?” Fyne is ranked 24th while Seesaw is ranked 37th. The most important reason people chose Fyne is:
Android and iOS are supported.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Built on top of Swing
Swing has some negative aspects about it - it's complex and difficult. However, it's stable and can stand alone. Seesaw essentially fills in the gaps that Swing leaves. It patches a lot of the workarounds and hacks that are required with Swing, and allows you to use all the benefits of Swing with considerably less code.
Pro Mobile support
Android and iOS are supported.
Pro Easy to learn
Simple and consistent API.
Pro Permissively licensed
Fyne is licensed under the 3-clause BSD license, which has fairly lax restrictions on usage.
Cons
Con Go specific
Fyne is only usable in Go applications.