The **Semantikos Open English Wordnet **Android app is available on Google Play . It's dedicated to OEWN meant to make its browsing easy. It's a sister app to Semantikos WordNet.
The full Semantikos app can download and explore a data set with EWN at its core, with VerbNet, PropBank, FrameNet, PredicateMatrix joined to it.
Treebolic WordNet Android app is available on Google Play . It offers hyperbolic visualisation of WordNet trees.
A trial or with-ads editions are available.
Treebolic WordNet app is available on SourceForge . It offers hyperbolic visualisation of WordNet trees. It's cross-platform: Linux, (hopefully) Windows, MacOS, whenever there's a Java 8 Virtual machine available with Swing.