i need chat app that have all chating in one place

I am looking for a skilled developer or agency that to create a chat app that will serve as a centralized platform for all my messaging needs. Platform Compatibility: - The app should be available on multiple platforms, ensuring like whatsapp skype messenger linkedin and other platform in one place that I can access it from my smartphone, tablet, and computer. Encryption: - Communication within the app should be encrypted to ensure the privacy and security of my conversations. Ideal Skills and Experience: - Proficiency in mobile app development, specifically for both iOS and Android platforms. - Strong knowledge of encryption protocols and best practices for secure communication. - Experience in creating user-friendly and intuitive interfaces for seamless chatting experience. - Ability to integrate various messaging platforms into one app, such as WhatsApp, Messenger, and Telegram. - Familiarity with backend development to ensure smooth functionality and synchronization across devices. Overall, I am seeking a developer who can create a reliable and secure chat app that meets my personal messaging needs while providing a seamless and user-friendly experience across multiple platforms. note:- only who has work demo than bid.