This is more an extension than a tweak. You must install Snapchat from the AppStore, before using Phantom. Some of the best in-app features:
Keeping Snaps in your feed and marking them as read when you want
Ability to disable Hold gesture
Snap log that saves all your sent media
Easy to enable or disable Phantom
Be able to select several contacts in one go
Save your received media to a specific photo album, to your camera roll or to a password protected folder
Send video and images direct from camera roll
Lots of new caption effects
Additional notification features including being able to set a specific notification sound, getting notifications on the status bar and the ability to hide the badge count when you come out of SnapChat.
Very important notice
DO KEEP IN MIND THAT USING TWEAKS LIKE THIS CAN GET YOUR ACCOUNT BANNED FROM SERVICE.
PLEASE USE IT AT YOUR OWN RISK.
ALL SNAPCHAT IN-APP SUPPORT REQUESTS WILL BE IGNORED.