The Pro Pass is the premium upgrade in Daily Dash. The Pro Pass can be purchased each new monthly season of the Daily Dash. It is not a recurring subscription.
The Pro Pass includes the following benefits:
You can purchase the Pro Pass by hitting the yellow button that says "BUY PRO PASS" from the main Daily Dash menu (as seen below).
Even if you buy a Pro Pass on the last day of a month, you'll still get all of the Pro Pass prizes that you've earned enough points for that month. It makes more sense to buy the Pro Pass at the beginning of a month, though, so you get all 36 attempts daily without having to watch ads.
If you have already purchased the Pro Pass for the month you will see a Pro Pass icon in the main Daily Dash menu (as shown below).