We recommend registering your Klok Cloud Sync Account from Klok Pro Desktop using the steps in the following knowledge base article. 

Getting Started with Klok Pro Mobile (Beta) + Cloud Sync

http://support.getklok.com/forums/27509/topics/23604 

You can also register your account through the Klok Mobile app from your mobile device following the instructions below.

Note: A few users provided feedback indicating they were not able to register through the Mobile app. However, they were able to register after following our recommended registration instructions noted above.

1. Open your mobile web browser and access the Klok Mobile app using the link https://m.getklok.com.

2. From the main login screen (see screen shot below) tap or click the ‘Not Registered? Start Here’ link.

3. Once you’ve been redirected to the registration page, enter an email address and a password then Click ‘Sign Up’.