Using the app, you can modify your profile name, modify the email connected to your account or change your account password.
To modify your profile for example:
Open the app and tap on the three horizontal lines in the upper left corner. Then go to "Settings". Tap on "Edit profile". Now tap on your name and change it. The change you make is automatically saved.
If you want to change your name in a poll you participated in, please switch to the mobile browser or the desktop version. Then open the poll in your browser whilst being logged in to your Doodle account. Click the pencil next to your name. Change your name and save the change.