A picture-board app could help users arrange personally meaningful symbols, photographs and phrases. The right layout depends on how an individual communicates, so customisation and consistent access matter more than a large catalogue alone.
Users or authorised supporters may need different editing permissions. Everyday use should remain simple, with protections against accidentally deleting an important board. Shared boards require clear consent and a way to avoid exposing private photographs unnecessarily.
Prototype with intended users and, where relevant, communication specialists. Test touch accuracy, alternative inputs and use without a connection. The app should support an individual's established communication approach, without claiming that one interface suits everyone or that software replaces assessment and support from appropriately qualified professionals.
Related reading: Mobile App Accessibility: Make Your App Easier to Use.