You can change your password from the web app, or from mobile. However, if you cannot log into the application, please check out this article: Forgot Password. We'll start with the web app.
Web
To change your password, go to app.trayn.com and log in with your email address and current password.
In the upper right area click on your name or profile picture.
Switch to the Password tab and use the form to change the password
Mobile
On mobile, the process is very similar. You can find the change password link right below your profile picture in the menu.
Click the link and you can enter your existing, and the new password.
If you forgot your password and cannot login, please read this article: