Google Keep is a minimalist note-taking app that comes with a slew of features. The app is very straightforward to use, allowing you to easily create collaborative to-do lists, voice notes, and so much more. Keep seamlessly syncs between the web client, Android and iOS apps, and there's even a Chrome extension that lets you quickly jot down a note.
An update rolling out to the service now lets you pin notes at the top, giving you quick access to your important notes. Pinning a note is easy: just long press anywhere on a note to access the menu options, and tap the pin icon. All pinned notes show up in a separate section at the top of the screen.