Hey. I'm looking for a personal knowledge app. Not so much for taking notes on the go but more as a central place for information I often look up. For example train schedules or some of my own pdf schedules and the likes. It should also be flexible to enter new data (type in, take photo, pdfs from the web ideally) I'm not looking for a project-planning application. More something like a tank where I can throw in data and then be able to easily find and access it. Thanks for your recommendations!