An app that teaches Arabic through humor, a hidden touch button built into your selfie-camera area, a service that helps deaf and hard-of-hearing users and an open-source tool that turns Android devices into advanced document scanners: here are four useful apps you may not know about Rylo: Making phone calls accessible for the deaf and hard of hearing The Rylo app (formerly "Nagish") provides an AI-powered solution for the deaf and hard-of-hearing community. The system enables users to conduct phone calls through real-time speech... [2691 chars]