If you need a Microsoft SwiftKey alternative, Auri is worth a look. It's a full-featured productivity suite that includes a multilingual AI Keyboard for writing, translation, paraphrasing and grammar checking in more than 80 languages. The keyboard also supports dictation by voice and has a built-in note-taking interface. It's available on multiple Apple devices and doesn't track or store content, so it's private.
Another contender is Slate, an AI-powered mobile keyboard that's designed to keep you productive when you're away from your laptop. Slate lets you do laptop-style writing and note-taking directly on your phone, helping to bridge the gap between mobile and desktop productivity. Its AI capabilities can help you write, too, so it's good for filling in chat boxes and other apps.
If you want a more personal writing assistant, Typly can generate AI responses to your prompts, process text and optimize email. It also comes with a customizable software keyboard in light and dark modes and supports multiple languages. Typly can integrate with your email inbox and other systems, too, for a more complete tool for personal and work use.