Keep It is a notebook, scrapbook and organizer, ideal for writing notes, keeping web links, storing documents, images or any kind of file, and finding them again. Available on Mac, and as a separate app for iPhone and iPad, Keep It is the destination for all those things you want to put somewhere, confident you will find them again later.
Clean Design, Reasonable PriceCons:
Sluggish, Not Robust, and Buggy
I don't want to sound harsh but I've tried this for a while, both the iOS and macOS app. They are fine, but not great. You'll face strange bugs every know and then, and the app starts to behave unstable as soon as you push it. I would not recommend it. A solid alternative would be DEVONthink.Amir has used this product for one year.