Reminders+ is a free Cydia tweak that let you allow to put your specific reminders on your iPhone’s lockscreen, with the help of stock iOS Reminder application.
You just have to download and install Reminder+ cydia tweak through BigBoss repo, which will automatically get integrated to Reminder app on iPhone.
Now, just open your reminders in Reminder application on iPhone, and tap on any of reminder text and you will find there an option of “Add Bulletin”, so tap on that and see your that specific reminder is pinned to iPhone lockscreen.
Note: Reminders+ cydia tweak does not put your reminders automatically on iPhone lockscreen.
Nice Cydia tweak to bring reminders on lockscreen.