Question: Is there a note-taking app that offers robust integration with other tools, AI-powered writing assistance, and hierarchical folder organization?

Saner is a powerful productivity app designed for people with ADHD. It's got a full-featured note-taking and task management system with built-in AI assistants. Saner has AI writing assistance, hierarchical folders, strong integrations, customizable templates and end-to-end encryption for security. It can convert recordings into text and share notes for collaboration, too, so it's good for people who want to be organized.

Another strong contender is Reflect, which taps into OpenAI's GPT-4 and Whisper technology for features like voice note transcription, article summarization and grammar checking. Reflect lets you link notes with backlinks, import web clips and Kindle highlights, and integrates with services like Zapier, Google and Outlook. It's got end-to-end encryption for security, and it works on mobile, desktop and web versions.

For people who need AI-powered knowledge management, NoteGPT is designed to help you take notes, summarize information and organize it. It's got AI summarization, YouTube timestamped transcripts and automated note-taking abilities. NoteGPT lets you collaborate with sharable links and embedded notes, so it's good for students, professionals and anyone else who needs to process a lot of information.