Android only: Creating folders on a home screen, then finding and dragging apps into them, isn't quick or precise. Apps Organizer and its broader cousin Folder Organizer make creating and accessing batches of apps, contacts and bookmarks much easier.
Rather than creating a folder and having to do a whole lot of scrolling and dragging to fill it up, Apps Organizer lets you create "Labels", which you can then add apps to from a single list of your device's apps. The organiser comes with a few labels pre-loaded, but you'll probably want to create your own, give them a unique icon (from stock choices or your own images), and place an icon wherever you'd like from the Shortcuts or Widgets menus. If you want to quickly change up the rotation of a particular label, you can create a shortcut to a Starred Apps label.
When you want to get even geekier with your home screen labels, you can download the same developer's Folder Organizer app, "Lite" or full, to create auto-updating labels and widgets that contain apps, bookmarks, contacts and whatever else you can fit on your home screen:
Apps Organizer is a free download for Android phones only.