All in one
Definition 1 of 2
Pro Tip 1/3Usage Context
Use 'all in one' for items that combine several functionalities, which helps reduce clutter or save space. 
Her new phone is an all-in-one device—camera, GPS, and music player.
Pro Tip 2/3Convenience Highlight
'All in one' implies that the item makes tasks more convenient by merging features that work together often. 
The all-in-one cooking appliance has revolutionized my weekend meal prep.
Pro Tip 3/3Implicit Value
Products described as 'all in one' often market themselves as offering great value by combining several uses. 
This all-in-one gym equipment saves costs on multiple machines.