Evernote is an easy-to-use, free app that helps you remember everything across all of the devices you use. Stay organized, save your ideas and improve productivity. Evernote lets you take notes, capture photos, create to-do lists, record voice reminders--and makes these notes completely searchable, whether you are at home, at work, or on the go
The original and most popular handwriting app for iPad. Penultimate gives you the natural experience of writing on paper, with the added power and availability of Evernote. Take notes, keep sketches, or share your next breakthrough idea -- in the office, on the go, or at home on the sofa.3- StudyBlue
This app is made for serious studiers; flip online flashcards for fast feedback on what you know, then re-study concepts you’ve not yet mastered using Study Filters. Review class notes or make flashcards whenever you have a minute to spare. Study over breakfast or late at night – at the library or in a coffee shop. Do what works for you, whenever and wherever you are.4- StickyNotes Pro
Sticky Notes isn't just a note taking and organizing app - it's a versatile tool to create fun and creative notes and reminders. Add alarms to the notes. Use our "task" notes for checklists. Select from our dozens of visual note styles. Organize your notes into an unlimited number of sortable category folders. Password protect your notes. Share and collaborate on notes with others. The list goes on! Use Sticky Notes to create personal reminders, shopping lists, school notes, special notes to your loved ones, and more.
5- Microsoft One Note
Microsoft OneNote for iPhone is your digital notebook for capturing what's important in your personal and professional life. Jot down your ideas, add pictures, update your shopping list, and check your to-do's from this Microsoft Office app.6- Simple Note
The Simplenote experience is all about speed and efficiency. Open it, write some thoughts, and you're done. As your collection of notes grows, you can search them instantly and keep them organized with tags and pins. You can also share notes and publish them for other people.
Notability is so powerful that it will transform how you work: sketch ideas, annotate documents, sign contracts, complete worksheets, keep a journal, jot travel notes, teach a class, make a presentation and much more. With iCloud support, your notes stay up to date on all your devices!
8- Super Note
Super Note helps you create notes very rapidly and make voice recordings during. The notes are color coded so you can find them instantly, and you can swipe through them to go from one to the other. You can also set alert reminders on your notes or change the note color / category on the fly.