Yes, you can try Stepler Coach free for 3 days if you pay for it through Apple or Google.
If you’re satisfied and want to continue, you don’t need to do anything after the 3 day trial.
If you’re not satisfied and want to cancel, simply follow the instructions to end your subscription.
Please note that the free trial is only available if you purchase Stepler Coach via Apple/Google. With Epassi, the free trial is not included.