With millions of users worldwide, Evernote is a popular go-to app for research, note-taking and content organization.

The mobile application can be used to create notes, checklists, copy and save articles and content, as well as store files such as documents and photos, which can be organized how you please. One of the app's most appealing strengths is the ability to sync your content to a range of devices.

Price: $Free | In-app purchases

Via: App Store