Yes, You can purchase tickets through the FishDonkey app. 
To do that, follow these instructions: 
Download the Fish Donkey App 
Register and Sign In 
Select “Fish in a Tournament” (This is a yellow button just under the top bar) 
Search for “Americas Ice Fishing Tournament” and select it.
Select the yellow “Join Now” button. 
Confirm that your personal information shown is correct and select the yellow “Continue” 
Select the “Select Division” dropdown. This will show “open.” 
Once you select that, it will give you your total, select “Continue” 
Enter your credit card number, and include any promo codes or vouchers you are using. Select “Pay”