With DingDing you can sincronize your smartphone with another smartphone, and only with one click, you can send a message to your couple in a notification style, that warn him/her you need something! His/Her smartphone will vibrate and make sound (if the configuration allow this).
DingDing is a simple app that pretends to make a quickly communication with your special person.
How it works?
Simply, ask your partner about the his/her app's API-KEY and make a "relationship" with it. THAT'S ALL!! you will be directly connected and you will send instant notifications to him/her.