Harvest Bible Church is using Instant Church Directory:
The first time you connect to this site, click the Create a Login now link under the Sign In button. Enter your email address and setup a password, which will trigger an email confirmation. Click the link within that email to confirm your address, and then you’ll be able to log in with the password you created.
Instant Church Directory also has mobile apps. To download the app, click the appropriate image for your device: