One of the best app for taking notes is Evernote, this app has been a leader in the note taking apps for a long period. Evernote is cloud based tool in which we can take notes from computer and smartphone that can be synchronized across devices. You can type a note in Laptop and access it on your tablet or phone almost instantly, Evernote is available for Windows, Mac, Android and also iOS.
Evernote also has brilliant organizations features to group our notes based on tags for sorting, adding attachments to notes, web clipper, color-coding and many more.
Give this productivity tool a try, this app is available for free. There is also premium accounts available by monthly or yearly subscription.