You can change your email-address, you user name and your password any time on our website in your settings under: www.komoot.com/account/. Just click on "Edit" and enter your new email address.
Please note: You will only see the changed email-address in the app after your next login.
Just go to your Profile > Cogwheel icon > Profile information
The option to change your email address in the iOS app will come soon. For the moment, please change it on our website!