Try Power Apps and model-driven apps in Dynamics 365 apps
You can explore all Power Apps and model-driven apps capabilities in Dynamics 365, such as Dynamics 365 Sales and Customer Service, for free by signing up for trial licenses.
Power Apps trial
You can try Power Apps for free by signing up either for a 30 day trial or community plan.
Model-driven apps in Dynamics 365 trial
Visit https://trials.dynamics.com and select the required app to sign up for a 30-day trial.
For detailed information about signing up, purchasing or using individual model-driven apps in Dynamics 365, see the respective app's documentation at Dynamics 365 documentation.