A brand new tweak called
RespringProgress is now available in Cydia which allows you to enable a
progress bar to the respring screen of any jailbroken devices under the Apple
logo. This tweak is developed by Ethan Arbuckle and show the progress on
reboots as well. 
It is same as when you restore or update off your device with
progress bar like same white logo with black screen or black logo with white
screen. Though it may be not so useful but its nice and works with all
jailbroken devices running iOS 9 or higher. It will work when you install tweaks and respring your device.
After installing this tweak, it begins
to work immediately. You have no any option to configure this tweak but you
might get any options in the near future.
RespringProgress is available in Cydia
via BigBoss Repo for $0.99.
How to install RespringProgress on your
iOS devices.
  • First your device need to be jailbroken.
    If your device has not yet jailbroken then, Here’s  Howto jailbreak iOS 9 -9.0.2 using Pangu.
  • Go to Cydia
  • As BigBoss repo is a default source in
    Cydia, you don’t need to add it. If you find BigBoss repo blank then you can
    add manually with this
  • Search for RespringProgress and install
    it.
After respring your device it begins to
work smoothly.