There’s an app called One Chat for Mac and iPad that combines multiple chat services into one. The chat app supports WhatsApp, Skype, Facebook Messenger, Slack, Telegram, Google Hangouts, Twitter, and more. It auto-locks when you’re away, and you can use a password or Touch ID to lock it. You can schedule messages to send to friends, generate “Auto Smart GIFs), customize notifications, and a whole lot more. It also supports file transfer, so you can send and receive photos, videos, DOC, TXT, PDFs, with drag-and-drop support. It costs US$17.99, and you can buy multiple copies in case you have a business.
You can’t browse a list of your conversations. But you can send new messages using voice dictation.