Yes, our app is completely free for travelers to use. To unlock premium features may require spending some small amonuts of CLMB tokens. Our partners and activity providers may list on the Columbery platform vouchers and discount coupons for their services and goods also for free. Or the providers may use payed option to create economic incentive for users to visit their venues.
More details about Columbery model you may find in our whitepaper - https://ico.columbery.com/