Sometimes you actually need the app you blocked. The Scroll Pass is for that.
What it does. Unlocks your blocked apps for one hour, immediately, without spending coins.
How often. Once a week. It resets on Monday, and the Blocks tab shows a countdown to the reset once you've used it.
Where. The Blocks tab. The button is red and reads "Emergency Unlock", and changes to "Pass used this week" afterwards.
Hard Mode turns it off. If you've chosen Hard Mode there's no pass at all, which is the point of Hard Mode.
Use it for what it's for. Needing to reply to something on Instagram, or pull up a booking in an app you blocked. If you're using it every Monday morning, the real problem is that your blocks are too aggressive or your rates are too high, and the pass is papering over it.