Cannot move apps to SD card with Samsung Galaxy S4

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http://forums.androidcentral.com – Hi all, I have been using Android phone for years. Previosly I owned a HTC Sensation XL. I have no problem of moving the apps between internal phone memory & SD storage. This week just purchased a Samsung Galaxy S4. After installed some apps, i realised there is no such option available to move the app from internal memory to SD card! In my previousl HTC phone, go to settings > apps > select the app that i want to move > move to SD card. Similarly doing the reverse will move the app from SD to internal storage. But S4 seems not having such option. :( pls help me. (HowTos)