Locked Screen Notifications
You can log your sets from the locked screen notifications if you have unlocked the Power Pack.
If this feature doesn't work for you, try this:
1) Open the app, tap a set, pull down the notifications. If you see a StrongLifts notification but without buttons, tap and pull down the notification. The buttons to enter sets will show after this. Android sometimes collapses the notifications by hiding the buttons, this is not something we can control unfortunately but you can manually have them show by just pull the notification down.
2) If that still doesn't work, go to settings (on your phone) - sounds and notifications - app notifications - StrongLifts. Make sure "block" is NOT enabled (it should be disabled so the notification isn't blocked)
After that the locked screen notification will work.