Checkmate is a savings app with over one million users that have saved $$$ on brands like Viator.
The Checkmate extension automatically applies Viator discount codes, Viator coupons and more to give you discounts on products like Lisbon Super Saver: 2-Day Sintra, Cascais, Fatima, Nazare and Obidos Small-Group Day Trips.
Checkmate users have also been loving these products from Viator.
Users have been saving products like this to their collections.