Evernote

Evernote - a Great note taking application with the ability to sync multiple devices. This application is very versatile, because you can usually keep notes only on one device here, you can even store them in the cloud, and at the right time to recover. Can no longer afraid of their loss, can also leave notes with your apple watch, and use the app on them, without losing even parts of functions. This app has received the trust of several million users.