1. Install Snapchat and login on first davice not rooted or rooted but stock firmware.
2. Install Titanium BackUp, tap on backup/restore and find Snapchat.
3. Tap on Snapchat, make backup apk+data.
4. Again tap on Snapchat, now tap on "send last copy" (you can send to another advice via Bluetooth)
5. Install Titanium BackUp on your second rooted davice and open.
6. Open file manager np. solid explorer.
7. Find your backup (TiBkp) and tap on this file.
8. Open with Titanium backup
9. Restore apk + data
This snap chat
http://www.apkmirror.com/apk/snapchat-inc/snapchat/snapchat-9-21-1-0-release/
is compatible with last snapprefs.
And I make this everything wit this version.
Don't need uninstall exposed with this method. I have xposed and I don't hawet problem with installation and backup my Snapchat. This is veri simply method. On my klte blisspop ROM working good