Unlike iPhones, closing Android apps doesn't remove them from the RAM. You can force-quit an app, thus removing it from the RAM, by doing the following:  Open Settings. Tap Apps. Select an app that you want to close. Tap FORCE STOP at the top of the page. Tap FORCE STOP or OK when prompted. Swipe down from the top of the screen, then tap the Settings gear icon in the top-right corner of the drop-down menu. If you don't have a Samsung Galaxy, the rest of this method won't work for you. It's near the bottom of the screen. Doing so opens the Device Maintenance app. This tab is at the bottom of the screen. It's in the middle of the page. Your Samsung Galaxy's RAM will begin clearing. Once the graphic in the middle of the screen disappears, your Samsung Galaxy's RAM has been cleared as much as possible. If your Samsung Galaxy is still running slower than you'd like, you can restart it to free up some remaining RAM: hold down the Power button, tap Restart, and tap Restart again when prompted.
किसी भी एण्ड्रोइड पर किसी ऐप को फ़ोर्स-क्विट करिए: अपने सैमसंग गैलेक्सी की सेटिंग खोलिए: Device maintenance Memory CLEAN NOW रैम द्वारा क्लियर करने के काम के पूरा हो जाने का इंतज़ार करिए: अगर ज़रूरी हो तब अपने सैमसंग गैलेक्सी को फिर से चालू करिए: