Now you really don't need to do the work manually. here i've posted an adb based batch script to install bulk apps at once using your PC.
1. PC with JDK installed.
2. usb drivers of your phone.
3. usb debugging enabled phone.
Download attachment from below and extract it anywhere in your PC. Now copy all the apks you wanna install, place them in input folder inside bulk app installer folder and run the install.bat script. wait for the installation to finish. tada you've done the work in so less time. and specially you don't get tired