Thanks for the feedback. We try to make a reasonable balance. Most of the core features of the game are free to play. For less than the price of a sandwich or fancy cup of coffee...The paid version removes ads. Creating and running quality games such as Word Mocha takes many hundreds of thousands of dollars so at some point we hope it is interesting enough for people to spend money for hints or to remove ads if they seem bothersome. Thanks for playing!
If you would like to upgrade to the paid version you can tap the coin symbol in the bottom left of the screen to remove ads. Thanks