To cancel your Hint subscription please follow the steps below:
If you purchased your subscription via Apple App Store:
https://support.apple.com/en-us/HT201266
If you purchased your subscription via Google Play:
https://support.google.com/googleplay/answer/7018481?hl=en&co=GENIE.Platform%3DAndroid
When you cancel a subscription you’ll still be able to use your subscription for the time you’ve already paid.
For example, if you buy a one-year subscription on Jan. 1 for $10 and decide to cancel your subscription on July 1:
You’ll have access to the subscription until Dec. 31.
You won’t be charged another yearly subscription of $10 the following Jan. 1