WriteMage is a powerful AI app that helps boost productivity in any macOS or iOS app. It utilizes the ChatGPT technology to remember conversations and answer accordingly. It is free during the beta period, and users can get 25% off the launch sale until 15 March 2023. The app is integrated natively with the iOS keyboard, and users can purchase an in-app purchase to use their own API key in the WriteMage iOS app. The lifetime deal includes both the macOS and iOS apps and eliminates the need to manage the API part.