You get 504 error during installation then Uninstall Apps2SD free version , Wipe Dalvik cache , Clear Play Store data and cache, restart and try again it will work
Before using the application take a full backup. Apps2SD will not be responsible for any loss of data or damage your phone.
+ Link2SD : Link apk , odex , dex , lib internal data , external data and obb folders of user / system apps to SD card .
+ Busybox install ( No need to -have a separate app to install busybox , Now Apps2SD ships with the busybox binary)
+ Move apps to SD card using native app2sd (move strength if move to SD card is not supported by the app )
+ App Manager (Enable / Disable Services / Activities / Broadcast receivers / Content providers )
+ Hibernate Apps ( Hibernate user / system apps When screen turns off to save battery and Improve Performance )
For More Info Google Play
Supported Android
{2.3 and UP}
Supported Android Version:-
Gingerbread (2.3–2.3.7)- Honeycomb (3.0–3.2.6)- Ice Cream Sandwich (4.0–4.0.4)- Jelly Bean(4.1–4.3.1)- KitKat (4.4–4.4.4)- Lollipop (5.0–5.0.2) or UP
Download Apps2SD PRO All in One Tool 8.4 APK For Android