Question: I'm looking for a solution that allows me to access AI capabilities directly from my iOS keyboard across all apps.

If you want an app that lets you tap into AI abilities directly from your iOS keyboard in any app, WriteMage is a good option. This AI-powered information retrieval system builds ChatGPT directly into macOS and iOS machines, providing context-aware abilities without the need to copy and paste. WriteMage comes with features like a customizable Prompt Editor GUI, a local chat history with labeled conversations, and native integration with the iOS keyboard. It offers several pricing tiers, including a Basic plan that supports two macOS devices and the iOS keyboard for $10/month or $119.99/year.

Another option is Private LLM, a local AI chatbot for iOS and macOS that's focused on privacy and offline use. It supports a range of open-source LLM models and can perform grammar correction, summarization and text expansion in multiple languages. The app is a one-time purchase and uses advanced quantization techniques for better model performance. Private LLM supports family sharing and integrates with Siri and Shortcuts, so it's geared for individuals and families who want a private, local AI assistant.

For those who want a more general-purpose AI tool, AI Anywhere is an integrated AI copilot that works in many apps, documents, emails and websites. You can use it to read, write, code and take actions like translation and summarization. The AI Anywhere Pro version also includes GPT-4 access and custom prompts, so it's a good option for people who want to use AI to boost productivity.