You don’t get notification because of one or more of the below reasons:
A) You didn't use the app a week.
B) You didn’t enable this option on your device. To solve this issue follow these steps:
1. Go to “Settings” on your device (app or tablet)
2. Select "Apps"
3. Check "Show notifications"
C) You didn’t enable this option on your app. To solve this issue follow these steps:
1. Go to “Menu”
2. Tap "Settings"
3. Check "One Word a Day Notification