EVERNOTE

Free (iAps) Made for iPhone, iPad

Apple has gradually been adding features to the iOS Notes app, but Evernote has been way ahead for years. The basic version is free, and as well as creating simple notes and to–do lists it also allows you to scan in receipts and other docs, record voice memos, or grab photos and articles from web pages. All of this can be combined within “notebooks” to organize individual events or projects.