Today Google has officially launched the Keep, based note service Google Drive leaked few days ago. There Keep version running on web at drive.google.com / keep and an application for Android 4.0 and above. Keep most of the features you expect in a service note as select colors for each note, insert images, recording files, create to-do lists, delete / store notes. Separate widget app on the Android support and the ability to convert voice to text, but it does not support English. For all your notes are located on Google Drive, so they will be synchronized between multiple devices quickly, similar to the behavior of Evernote or Catch Notes.
Google yet to mention Keep applications for other platforms like iOS, Windows Phone, Windows, OS X. The company said that in the coming weeks, we can use live Keep from Drive, not the path above.