I don't think there's any field that requires a special approach to mindfulness, but it may be useful to people in those fields to have examples put in relatable contexts - that's why you'll see Mindfulness For Athletes/Executives/Etc... even if it kind of all boils down to common elements.
Are you using Crosswalk for both iOS and Android, or just for Android? We've been using Ionic + Cordova with pretty good results on iOS so far, but we're starting to shift focus onto the Android offering.