[header] How to reduce memory usage on android and iphones [title] Find the apps that are using the most memory. [step] You can check your phone's status to see how much memory (ram) is currently being used, and which apps use the most. Note that ram is meant to be used, so having just a little unused ram available is not a bad thing. 
Android will attempt to keep the majority of your free ram in use, as this is the most effective usage of it. [substeps] Open the settings app on your device.