The Froala Editor can be used in native mobile applications (e.g. iOS / Android) only under the Pro license - https://www.froala.com/wysiwyg-editor/pricing.
At this moment, we do not provide native integration, however, it is possible to integrate the editor in both Swift (iOS) and Java (Android) apps by using a WebView component. Inside the WebView, you can initialize the editor just like described in our docs.